# Useful Tools — InternetAgentur.com

> Free browser-based utility tools. No login, no install, no tracking. Every tool runs entirely in the browser.

## Health Tools
- [BMI Calculator — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/bmi-calculator/): Calculate your BMI instantly and see your weight category, healthy weight range and how far you are from it. Metric or imperial units, 100% in your browser, n
- [Calorie Calculator — BMR, TDEE and Macros](https://internetagentur.com/briefe/ben/usefulltools/calorie-calculator/): Basal metabolic rate (Mifflin-St Jeor), daily energy need with five activity levels, calorie targets for losing, holding and gaining weight, plus macros in gr

## SEO Tools
- [Alt Text Checker — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/alt-text-checker/): Check image alt texts in your HTML for free. Paste your code, instantly see missing, empty, too short or duplicate alt attributes — 100% in your browser, no u
- [Broken Link Checker — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/broken-link-checker/): Check a list of URLs for broken links for free. Paste your links, click Check, and instantly see every HTTP status — 404s, 500s and redirects flagged in a cle
- [Heading Structure Checker — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/heading-structure-checker/): Check your page heading structure online for free. Paste your HTML, instantly see the H1–H6 hierarchy, missing or multiple H1 tags and skipped heading levels 
- [Hreflang Tag Generator](https://internetagentur.com/briefe/ben/usefulltools/hreflang-generator/): Generate hreflang HTML tags and HTTP headers for multilingual websites. Add language/region entries, set x-default, copy output with one click. Free online hr
- [Keyword Density Checker — Free Text Analysis](https://internetagentur.com/briefe/ben/usefulltools/keyword-density-checker/): Count word, 2-word and 3-word phrases in your text, see their density in percent, first position and a verdict — with built-in stop word lists for English and
- [Meta Description Checker — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/meta-description-checker/): Check your meta description for free. Paste it and instantly see length, keyword usage, call-to-action and a Google-style preview — 100% in your browser, no u
- [Meta Tag Analyzer — Check Meta, OG & JSON-LD](https://internetagentur.com/briefe/ben/usefulltools/meta-tag-analyzer/): Parse all meta tags of a page: standard SEO, Open Graph, Twitter Cards and Schema.org JSON-LD — with JSON validation, duplicate detection and a generator for 
- [Meta Tag Generator](https://internetagentur.com/briefe/ben/usefulltools/meta-generator/): Generate SEO meta tags including Open Graph and Twitter Card tags with real-time SERP preview. Free online meta tag generator tool.
- [Page Title Analyzer — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/page-title-analyzer/): Analyze your page title for Google for free. Instantly see length, exact truncation point, keyword placement, power words and a 0-100 score — 100% in your bro
- [Robots.txt Generator](https://internetagentur.com/briefe/ben/usefulltools/robots-txt-generator/): Generate a robots.txt file for your website with a visual builder. Supports user-agents, allow/disallow rules, crawl-delay, and sitemap URLs. Free online robo
- [SEO Audit — Free Website Analysis](https://internetagentur.com/briefe/ben/usefulltools/seo-audit/): Free SEO audit tool. Analyze any website
- [SEO Checker Tool — Free On-Page Analysis](https://internetagentur.com/briefe/ben/usefulltools/seo-checker-tool-free/): Paste a page
- [SERP Preview Tool — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/serp-preview-tool/): Preview your Google search snippet for free. Type your title, URL and meta description and see a live, Google-style result with truncation warnings — 100% in 
- [Sitemap Generator](https://internetagentur.com/briefe/ben/usefulltools/sitemap-generator/): Sitemap Generator - free online tool. No login, no install, instant results.

## Finance Calculators
- [Break-Even Calculator — Quantity, Revenue & Chart](https://internetagentur.com/briefe/ben/usefulltools/break-even-calculator/): Work out the break-even quantity and revenue from fixed costs, price and variable unit costs — with contribution margin, margin of safety, target profit and a
- [Compound Interest Calculator — Monthly or Annual](https://internetagentur.com/briefe/ben/usefulltools/compound-interest-calculator/): See what a starting capital, a monthly contribution and an interest rate grow into. Choose monthly or annual compounding and get the end capital, the amount p
- [Currency Converter](https://internetagentur.com/briefe/ben/usefulltools/currency-converter/): Currency Converter - free online tool. No login, no install, instant results.
- [Discount Calculator — Sale Price and Effective Saving](https://internetagentur.com/briefe/ben/usefulltools/discount-calculator/): Work out the sale price and the real saving: enter the original price, a discount in percent or as an amount, and optionally a second discount on top — the to
- [EMI Calculator — Free Loan EMI Calculator](https://internetagentur.com/briefe/ben/usefulltools/emi-calculator/): Calculate monthly EMI, total interest, and total payment for any loan. Includes amortization schedule with real-time updates.
- [FD Calculator](https://internetagentur.com/briefe/ben/usefulltools/fd-calculator/): Calculate Fixed Deposit maturity amount, interest earned, and year-by-year growth. Supports monthly, quarterly, half-yearly, and yearly compounding.
- [Fuel Cost Calculator](https://internetagentur.com/briefe/ben/usefulltools/fuel-cost-calculator/): Fuel Cost Calculator - free online tool. No login, no install, instant results.
- [GST Calculator — Free GST Tax Calculator](https://internetagentur.com/briefe/ben/usefulltools/gst-calculator/): Calculate GST amounts instantly. Supports 5%, 12%, 18%, 28% GST rates. Compute GST inclusive and exclusive prices with clear breakdowns.
- [Loan Calculator with Repayment Plan — Free](https://internetagentur.com/briefe/ben/usefulltools/loan-calculator/): Calculate the monthly payment, total interest and full repayment plan of an annuity loan — plus optional yearly extra payments that shorten the term. Runs in 
- [Mortgage Calculator — Payment, Balance & Interest](https://internetagentur.com/briefe/ben/usefulltools/mortgage-calculator/): Work out the loan amount, monthly payment, loan-to-value and the outstanding balance after 10, 15 and 20 years from the purchase price, ancillary costs, equit
- [Percentage Calculator — Four Modes, One Tool](https://internetagentur.com/briefe/ben/usefulltools/percentage-calculator/): Four percentage questions in one tool: what X percent of a value is, what share one number is of another, an increase or decrease in percent, and the percenta
- [Profit Margin Calculator — Free Gross Profit & Markup Calculator](https://internetagentur.com/briefe/ben/usefulltools/profit-margin-calculator/): Calculate profit per unit, profit margin %, markup %, and total profit instantly. Visual revenue vs cost comparison with color-coded results.
- [ROI Calculator — Free Return on Investment Calculator](https://internetagentur.com/briefe/ben/usefulltools/roi-calculator/): Calculate ROI %, annualized ROI %, net profit, and payback period instantly. Visual investment vs return comparison with color-coded results.
- [Salary Calculator — Hour, Day, Week, Month, Year](https://internetagentur.com/briefe/ben/usefulltools/salary-calculator/): Convert a salary between hour, day, week, month and year with your own weekly hours — including 13th salary, holiday pay, overtime with a surcharge and a self
- [Shipping Cost Calculator — Volumetric Weight, Zones & Surcharges](https://internetagentur.com/briefe/ben/usefulltools/shipping-cost-calculator/): Calculate shipping cost from weight and dimensions: volumetric weight, chargeable weight, zone tariffs, quantity tiers, bulky goods, COD and insurance surchar
- [SIP Calculator](https://internetagentur.com/briefe/ben/usefulltools/sip-calculator/): Calculate the maturity value of your Systematic Investment Plan (SIP) with year-by-year growth visualization.
- [Tip Calculator — Tip, Total and Split per Person](https://internetagentur.com/briefe/ben/usefulltools/tip-calculator/): Work out the tip, the total and how much each person pays. Enter the bill, pick a tip percentage (5/10/15/18/20 or your own) and optionally split it between s
- [VAT Calculator — Add or Remove VAT (19% / 7%)](https://internetagentur.com/briefe/ben/usefulltools/vat-calculator/): Add VAT to a net amount or take it out of a gross amount. German rates 19% and 7% are one click away, any other rate can be typed in — net, VAT and gross are 

## Text Utilities
- [Binary Converter — Free Online Number Converter](https://internetagentur.com/briefe/ben/usefulltools/binary-converter/): Free online binary converter. Convert numbers between binary, decimal, hexadecimal, and octal number systems instantly. Essential for programmers, computer sc
- [Capitalize Text — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/capitalize-text/): Capitalize your text instantly: uppercase the first letter of every word, sentence case, title case, or convert to ALL CAPS / lowercase. 100% in your browser,
- [Case Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/case-converter/): Convert any text between lowercase, UPPERCASE, Title Case, Sentence case, camelCase, snake_case, kebab-case and more — instantly, in your browser.
- [Character Counter](https://internetagentur.com/briefe/ben/usefulltools/character-counter/): Real-time character, word, sentence, paragraph, line counter with reading time estimation. Free online text statistics tool.
- [Find and Replace Text — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/find-and-replace-text/): Find and replace text online for free. Paste your text, enter the word or phrase to find and its replacement, and instantly get the cleaned-up result — 100% i
- [HTML Entity Encoder — Free Online Tool](https://internetagentur.com/briefe/ben/usefulltools/html-entity-encoder/): Free HTML entity encoder/decoder tool. Encode special characters to HTML entities or decode them back to readable text. Essential for web developers working w
- [HTML to Markdown Converter — Headings, Lists, Tables, Code](https://internetagentur.com/briefe/ben/usefulltools/html-to-markdown/): Convert HTML to Markdown in your browser: headings, lists, links, images, tables, block quotes and code blocks. Uses the self-hosted turndown library.
- [Image to Text (OCR) — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/image-to-text-ocr/): Extract text from images and screenshots with OCR, entirely in your browser. No upload, no signup, 100% private. Drag & drop a photo and copy or download the 
- [Keyword Extractor — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/keyword-extractor/): Extract the most important keywords from any text online for free. Paste an article, product description or blog post and instantly get a ranked list of the w
- [Line Counter — Count Lines, Words, Characters & Duplicates](https://internetagentur.com/briefe/ben/usefulltools/line-counter/): Count lines (total, non-empty, empty), words, characters with and without spaces, sentences, the longest line and duplicate lines — live while you type, free.
- [Lorem Ipsum Generator](https://internetagentur.com/briefe/ben/usefulltools/lorem-ipsum-generator/): Generate placeholder text for mockups, designs, and layouts.
- [Lowercase Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/lowercase-converter/): Turn any text into lowercase while you type — German umlauts and the sharp s included (ÄÖÜ → äöü, ẞ → ß). Live character, word and line counters, copy, downlo
- [Markdown to HTML Converter — Sanitized Preview & HTML Source](https://internetagentur.com/briefe/ben/usefulltools/markdown-to-html/): Convert Markdown to HTML in your browser and see a sanitized live preview plus the HTML source. Uses the self-hosted marked and DOMPurify libraries.
- [Online Text Analyzer — Words, Sentences, Flesch Reading Ease](https://internetagentur.com/briefe/ben/usefulltools/online-text-analyzer-free/): Analyse text in your browser: words, characters, sentences, paragraphs, syllables, Flesch Reading Ease, reading time and the top 10 words. Live, free, no sign
- [Remove Duplicate Lines](https://internetagentur.com/briefe/ben/usefulltools/remove-duplicates/): Free online tool to remove duplicate lines from text. Dedup with case sensitivity, preserve order, sort unique lines, and more. Real-time preview.
- [Remove Duplicate Lines — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/remove-duplicate-lines/): Remove duplicate lines from any text instantly. Keep first or last occurrence, case-insensitive dedup, sort unique lines. 100% in your browser, no upload, no 
- [Remove Line Breaks — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/remove-line-breaks/): Remove line breaks from any text online for free. Paste your text, instantly get it as a single line or with spaces — 100% in your browser, no upload, no sign
- [Slug Generator](https://internetagentur.com/briefe/ben/usefulltools/slug-generator/): Convert any text into a clean, SEO-friendly URL slug. Type or paste text below — the slug updates in real-time.
- [Sort Lines Alphabetically — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/sort-lines-alphabetically/): Sort lines alphabetically online for free. Paste your list, choose A-Z or Z-A, instantly get a cleanly sorted list — 100% in your browser, no upload, no signu
- [Text Cleaner](https://internetagentur.com/briefe/ben/usefulltools/text-cleaner/): Paste or type text below, select the cleaning operations to apply, and see a live preview of the result.
- [Text Diff Checker — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/text-diff-checker/): Compare two texts online for free. Paste your original and changed version, instantly see added and removed lines highlighted — 100% in your browser, no uploa
- [Text Reverser — Reverse Text, Words & Lines](https://internetagentur.com/briefe/ben/usefulltools/text-reverser/): Reverse your text: characters, word order, line order or each line separately. Unicode-safe, so emoji and umlauts survive. Live counters, copy, download, rese
- [Text Summarizer — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/text-summarizer/): Summarize any text online for free. Paste an article, report or email, choose how short the summary should be, and instantly get the key sentences — 100% in y
- [Text to Slug Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/text-to-slug/): Convert any title or text into a clean, SEO-friendly URL slug instantly. Lowercase, remove special characters, choose hyphen or underscore. 100% in your brows
- [Uppercase Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/uppercase-converter/): Convert any text to UPPERCASE while you type — the German sharp s becomes SS (ß → SS, ẞ → SS). Live character, word and line counters, copy, download, reset.

## Developer Utilities
- [Base64 Decoder — Decode Base64 to Text (Safe, No Upload)](https://internetagentur.com/briefe/ben/usefulltools/base64-decoder/): Decode Base64 back to text. URL-safe alphabet and missing padding are accepted; invalid input is reported with position instead of printing garbage.
- [Base64 Encoder — Encode Text to Base64 (UTF-8 Safe)](https://internetagentur.com/briefe/ben/usefulltools/base64-encoder/): Encode text to Base64 in your browser — UTF-8 safe, so umlauts and emojis survive. Optional URL-safe alphabet and line breaks every 76 characters.
- [Cron Generator](https://internetagentur.com/briefe/ben/usefulltools/cron-generator/): Visually build cron expressions and preview their next fire times.
- [CSV to JSON Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/csv-to-json-converter/): Convert CSV to JSON for free in your browser. Paste CSV, get a clean JSON array with quoted commas, escaped quotes and multiline fields parsed correctly. No u
- [Hex to RGB Converter — Free Color Converter](https://internetagentur.com/briefe/ben/usefulltools/hex-rgb/): Convert between Hex and RGB color formats instantly. Supports 3-digit, 6-digit hex, and rgba with live color preview.
- [JavaScript Beautifier — Free Online Tool](https://internetagentur.com/briefe/ben/usefulltools/js-beautifier/): Beautify and format minified JavaScript into readable code.
- [JSON Formatter](https://internetagentur.com/briefe/ben/usefulltools/json-formatter/): JSON Formatter is a free browser-based utility: open the page, use the tool, get the result instantly. No signup, no install, no upload. Free, runs in your br
- [JSON to CSV Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/json-to-csv-converter/): Convert JSON to CSV for free in your browser. Paste JSON, get a clean CSV table with nested fields flattened — ready for Excel or Google Sheets. No upload, no
- [JWT Decoder — Free Online Tool](https://internetagentur.com/briefe/ben/usefulltools/jwt-decoder/): Decode JSON Web Tokens (JWT) without a server — inspect header and payload.
- [Regex Tester](https://internetagentur.com/briefe/ben/usefulltools/regex-tester/): Test regular expressions in real time. Supports flags, highlighting, and replace mode.
- [RGB to HEX Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/rgb-to-hex-converter/): Convert RGB, RGBA, HEX and HSL colour values into each other — with sliders, a live preview and one-click copy of every value.
- [Schema Markup Generator](https://internetagentur.com/briefe/ben/usefulltools/schema-generator/): Generate JSON-LD structured data for SEO. Supports Article, Product, FAQ, LocalBusiness, Person, Recipe, BreadcrumbList, Event, Review, and SoftwareApplicatio
- [URL Decoder and Encoder — Percent-Decode and Break Down URLs](https://internetagentur.com/briefe/ben/usefulltools/url-decoder/): Decode percent-encoded URLs and encode values in your browser. Shows protocol, host, path, query parameters and fragment in a table. Invalid escapes are repor
- [URL Encoder / Decoder — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/url-encoder/): Encode or decode URLs and query strings for free in your browser. Percent-encode text for links and API parameters or decode %XX back to readable text. Nothin
- [UUID Generator](https://internetagentur.com/briefe/ben/usefulltools/uuid-generator/): Generate UUID v4 (random) and v7 (time-ordered / sortable) identifiers.
- [Web Developer Tool Online](https://internetagentur.com/briefe/ben/usefulltools/web-developer-tool-online/): Web Developer Tool Online - free online tool. No login, no install, instant results.
- [XML to JSON Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/xml-to-json-converter/): Convert XML to JSON for free in your browser. Paste XML, get a clean JSON object with attributes, CDATA and repeated elements handled correctly. No upload, no
- [YAML to JSON Converter — Free Online Tool](https://internetagentur.com/briefe/ben/usefulltools/yaml-to-json/): Convert YAML to JSON and vice versa. Paste and convert instantly.

## Converters
- [Batch Image Resize — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/batch-image-resize/): Resize multiple images at once for free. No upload, no signup, 100% private — batch-resize JPG, PNG and WebP pictures directly in your browser and download th
- [Color Converter — HEX, RGB, HSL, HSV & CMYK](https://internetagentur.com/briefe/ben/usefulltools/color-converter/): Convert colours between HEX, RGB, HSL, HSV and CMYK, and check the WCAG contrast ratio against black and white with the AA and AAA verdict.
- [Color Palette Generator — Harmonies, Tints & Shades](https://internetagentur.com/briefe/ben/usefulltools/color-palette-generator/): Build real colour harmonies from one base colour — complementary, analogous, triadic, tetradic, split complementary and monochromatic — plus tints, shades and
- [Grayscale Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/grayscale-converter/): Convert your photos to black and white instantly in your browser. No upload, no signup, 100% private. Drag & drop images, adjust the grayscale intensity and d
- [Image Blur Tool — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/image-blur-tool/): Blur images online for free. No upload, no signup, 100% private — pixelate or smooth-blur any photo directly in your browser and download the result.
- [Image Colorizer — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/image-colorizer/): Colorize black and white photos or boost faded colors online for free. No upload, no signup, 100% private — add color to any image directly in your browser an
- [Image Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/image-converter/): Convert images between PNG, JPG and WebP in the browser, with quality and size control — no upload.
- [Image Mirror Effect — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/image-mirror-effect/): Mirror any image online for free. Flip photos horizontally or vertically — no upload, no signup, 100% private. Everything happens in your browser.
- [Image Processing Tool — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/image-processing-tool-online/): Rotate, mirror, resize and adjust images in your browser — grayscale, brightness, contrast, sepia, invert, then save as PNG, JPG or WebP. No upload.
- [Image to WebP Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/image-to-webp/): Convert PNG, JPG, GIF and BMP images to WebP format instantly in your browser. No upload, no signup, 100% private. Drag & drop your images and download as opt
- [Image Watermark — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/image-watermark/): Add a text watermark to any image online for free. No upload, no signup, 100% private — stamp photos with your logo text or copyright right in your browser an
- [JPG to PNG Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/jpg-to-png/): Convert JPG photos into PNG files directly in your browser — with optional resize and no upload.
- [Meme Maker — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/meme-maker/): Create memes online for free. No upload, no signup, 100% private — add classic top and bottom captions to any image directly in your browser and download the 
- [MP4 to MP3 Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/mp4-to-mp3-converter/): Convert MP4 video to MP3 audio for free in your browser. Drop a video, pick the bitrate, download your MP3 file. No upload, no signup, 100% private.
- [Online Converter Tool — JSON, CSV, XML, YAML, SQL & Markdown](https://internetagentur.com/briefe/ben/usefulltools/online-converter-tool/): Convert between JSON, CSV, TSV, XML, YAML, query strings and plain lines — and write the result as JSON, CSV, XML, YAML, Markdown, HTML, SQL, JavaScript or PH
- [Photo Compressor · Resize & Compress Images](https://internetagentur.com/briefe/ben/usefulltools/photo-compressor/): Free online photo compressor. Resize, compress, and convert images (JPEG, PNG, WebP) instantly in your browser. No upload, no login.
- [Photo Rotator — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/photo-rotator/): Rotate images online for free. No upload, no signup, 100% private — turn any photo 90°, 180°, 270° or any custom angle directly in your browser and download t
- [PNG to JPG Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/png-to-jpg/): Convert PNG images to JPG format instantly in your browser. No upload, no signup, 100% private. Drag & drop your PNG files and download as high-quality JPGs.
- [Remove Background — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/remove-background/): Remove image backgrounds instantly in your browser. No upload, no signup, 100% private. Drag & drop a photo and download a PNG with a transparent background.
- [Temperature Converter - Free Online Tool](https://internetagentur.com/briefe/ben/usefulltools/temperature-converter/): Free online temperature converter. Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly. Perfect for cooking, science, travel, and weather c
- [Time Duration Calculator — Free Online Date Duration Tool](https://internetagentur.com/briefe/ben/usefulltools/time-duration-calculator/): Free online time duration calculator. Calculate the exact duration between any two dates in years, months, days, total days, total hours, and total minutes. P
- [Unit Converter — Length, Mass, Volume, Data & More](https://internetagentur.com/briefe/ben/usefulltools/unit-converter-free/): Convert length, mass, area, volume, temperature, speed, time, data size, pressure and energy — 98 units with exact factors and a full table.
- [Video to GIF Converter — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/video-to-gif-converter/): Convert MP4 or WebM video to an animated GIF for free in your browser. Drop a clip, choose frame rate and size, download your looping GIF. No upload, no signu

## Business Tools
- [Age Calculator — Exact Age in Years, Months and Days](https://internetagentur.com/briefe/ben/usefulltools/age-calculator/): Your exact age in years, months and days — calendar-correct with leap years, plus weeks, hours, weekday of birth, next birthday and zodiac sign.
- [Ai Writing Tool Online](https://internetagentur.com/briefe/ben/usefulltools/ai-writing-tool-online/): Ai Writing Tool Online - free online tool. No login, no install, instant results.
- [Business Calculator — Margin, Markup, ROI & Cash Flow](https://internetagentur.com/briefe/ben/usefulltools/business-calculator-online/): Seven business ratios in one tool: margin, markup, contribution margin, ROI, profit, return on sales and cash flow — each with its inputs, result and the form
- [Grammar Checker Online — Free Rule Based Text Check](https://internetagentur.com/briefe/ben/usefulltools/grammar-checker-online/): Rule based text check: doubled words, missing spaces after commas or periods, duplicate punctuation, lowercase sentence starts, unbalanced brackets, long sent
- [Invoice Template Generator — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/invoice-template-generator/): Create an invoice in your browser: enter your details, add line items, taxes and discounts, preview it live and print or save it as PDF. No signup, nothing up
- [Merge PDFs Online — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/pdf-tool-online-free/): Merge multiple PDF files into one — free, no upload, no signup. All processing stays in your browser. Fast, private, and unlimited.
- [Productivity Tool Online](https://internetagentur.com/briefe/ben/usefulltools/productivity-tool-online/): Productivity Tool Online - free online tool. No login, no install, instant results.

## Evergreen Tools
- [Barcode Generator — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/barcode-generator/): Create Code 128, Code 39, EAN-13, EAN-8, UPC-A, ITF-14, MSI, Pharmacode and Codabar barcodes and download them as PNG.
- [CSS Gradient Generator — Live Preview & Copyable Code](https://internetagentur.com/briefe/ben/usefulltools/css-gradient-generator/): Build a linear or radial CSS gradient with two or three colour stops, set colours and positions, watch the live preview and copy the finished CSS code.
- [Domain Name Generator — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/domain-name-generator/): Domain Name Generator – kostenlos online nutzen, schnell, kein Login. Free, runs in your browser, no signup.
- [Fake Identity Generator — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/fake-identity-generator/): Fake Identity Generator – kostenlos online nutzen, schnell, kein Login. Free, runs in your browser, no signup.
- [Free Online Calculator Tool](https://internetagentur.com/briefe/ben/usefulltools/free-online-calculator-tool/): Free Online Calculator Tool - free online tool. No login, no install, instant results.
- [Generator Tool Online Free — Numbers, Dice, Lottery, Teams](https://internetagentur.com/briefe/ben/usefulltools/generator-tool-online-free/): Random numbers, dice rolls, coin tosses, lottery tickets, shuffled lists and random teams — all in the browser, with a secure or a fast random source.
- [Online Email Generator Tool Free — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/online-email-generator-tool-free/): Online Email Generator Tool Free – kostenlos online nutzen. Free, runs in your browser, no signup.
- [Password Generator Online — Batch Passwords, PINs & CSV](https://internetagentur.com/briefe/ben/usefulltools/password-generator-online/): Create up to 100 passwords at once as a table with length, entropy and strength per row. PIN mode, minimum digit and symbol counts, and export as .txt or .csv
- [Password Generator — Secure, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/password-generator/): Generate strong passwords and passphrases in the browser: choose the length and character sets, exclude similar characters, and see the entropy in bits. Built
- [QR Code Generator — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/qr-code-generator/): Create QR codes for links, text, WiFi, email, phone, SMS and contact cards — right in your browser, and download them as PNG.
- [Random Number Generator — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/random-number-generator/): Generate random numbers in any range you like — as many as you need, with or without duplicates, sorted or in draw order. Uses your browser
- [Username Generator — 4 Styles, Free & Private](https://internetagentur.com/briefe/ben/usefulltools/username-generator/): Build username ideas from adjective and noun lists in four styles, with your own separator, prefix, suffix and length limit. No availability check — the page 

## More Tools
- [Add Line Numbers — Free, Private & Instant](https://internetagentur.com/briefe/ben/usefulltools/add-line-numbers/): Add line numbers to any text online for free. Paste your text, choose the start number, step and separator, and instantly get numbered lines — 100% in your br
- [All Tools — 120 Free Online Utilities](https://internetagentur.com/briefe/ben/usefulltools/all-tools/): Every free tool on the site in one place: 120 browser tools for text, developers, SEO, images, finance and business. Search, filter, open.
- [Meeting Agenda Creator — Timed Agendas, Breaks & End Time](https://internetagentur.com/briefe/ben/usefulltools/meeting-agenda-creator/): Turn meeting topics into a real timed agenda: start and end time per item, cumulative timeline, automatic breaks and a check against your planned duration.

## Notes
- All tools are free and require no account.
- Full list: https://internetagentur.com/briefe/ben/usefulltools/
- Sitemap: https://internetagentur.com/briefe/ben/usefulltools/sitemap.xml