Der Werkzeugkasten
Alle deutschen Tools
Alle Tools auf Deutsch an einem Ort — kostenlos, ohne Anmeldung, und die meisten laufen vollständig in deinem Browser.
Weitere Tools auf Englisch
Diese Tools gibt es bisher nur auf Englisch — sie funktionieren aber genauso: kostenlos und ohne Anmeldung.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case or Sentence case — instantly, in your browser.
Text & SchreibenENReaction Time Test
Test your reflexes — click the moment it turns green, beat your best time and challenge a friend.
Tests & TrainingENPassword Generator
Generate strong, random passwords right in your browser — your passwords never leave your device.
GeneratorenENImage Compressor
Compress JPEG and WebP images right in your browser — smaller files, no upload, no quality guesswork.
BilderENColor Converter
Convert any color between HEX, RGB and HSL instantly — pick, preview and copy in one place.
FarbenENMerge PDF
Combine several PDF files into one document — fast, private and entirely in your browser.
PDFENUnit Converter
Convert length, weight, temperature and data units instantly — right in your browser.
UmrechnerENJSON Formatter
Format, beautify and minify JSON with instant validation — all in your browser.
EntwicklerENUTM Builder
Build tagged campaign URLs with UTM parameters for accurate analytics tracking.
SEO & WebENOvertime Calculator
Work out how many overtime hours you've done and what they pay — set your standard hours, hourly rate and overtime multiplier.
RechnerENGPA Calculator
Add your courses, pick a letter grade and credit hours for each, and get your grade point average on the standard US 4.0 scale.
RechnerENGrade Calculator
Find out exactly what score you need on your final exam to reach the overall grade you want — enter your current grade, your target and the final's weight.
RechnerENWord Frequency Counter
Paste any text to see how often each word appears — total and unique word counts plus a ranked table of the most-used words, with an option to skip common stop words.
Text & SchreibenENTime Duration Calculator
Find the time between two clock times — enter a start and end time, subtract a break, and read the duration in hours and minutes, total minutes and decimal hours.
RechnerENTimesheet Calculator
Add up a week of work hours — enter start, end and break times for Monday to Sunday and get your daily hours, weekly total and gross pay.
RechnerENText Sorter — Sort Lines
Sort lines of text alphabetically, numerically or by length — with case-insensitive matching, trimming, de-duplication and reverse, all live.
Text & SchreibenENSleep Calculator
Find the best time to go to bed or wake up based on 90-minute sleep cycles — so you wake between cycles feeling rested, not groggy.
RechnerENRunning Pace Calculator
Turn a distance and a time into your running pace per kilometre and per mile, plus speed in km/h and mph — with 5K, 10K, half and marathon presets.
RechnerENFuel Cost Calculator
Work out how much fuel a trip needs and what it costs — in metric or imperial units, with round-trip and split-between-people options.
RechnerENSales Tax Calculator
Add sales tax to a price or strip it back out of a gross total — enter an amount and a rate to see the net, the tax and the total instantly.
RechnerENRoman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers, with standard subtractive notation and a breakdown of how each numeral is built.
UmrechnerENRandom Number Generator
Generate random whole numbers in any range — set a minimum, maximum and count, with options for unique (no repeats) and sorted results.
GeneratorenENAspect Ratio Calculator
Find the aspect ratio of any width × height and resize to new dimensions without stretching — with 16:9, 4:3 and more as presets.
RechnerENCM to Inches Converter
Convert centimeters to inches (and back) instantly — with common values, the exact formula and a reference table.
UmrechnerENKG to LBS Converter
Convert kilograms to pounds (and back) instantly — with common values, the exact formula and a reference table.
UmrechnerENCelsius to Fahrenheit Converter
Convert Celsius to Fahrenheit (and back) instantly — with common values, the exact formula and a reference table.
UmrechnerENMiles to KM Converter
Convert miles to kilometers (and back) instantly — with race distances, the exact formula and a reference table.
UmrechnerENFeet to Meters Converter
Convert feet to meters (and back) instantly — with common values, the exact formula and a reference table.
UmrechnerENLiters to Gallons Converter
Convert liters to US gallons (and back) instantly — with common values, the exact formula and a reference table.
UmrechnerENOnline Stopwatch
Full-featured online stopwatch with laps — start, pause and record lap times with keyboard shortcuts, accurate to the centisecond.
Tests & TrainingENOnline Timer — Countdown with Alarm
Set a countdown in seconds — pick a preset like 5 or 25 (pomodoro) minutes or a custom time, and get a flash plus alarm beep when it hits zero.
Tests & TrainingENInvoice Generator
Build a clean, professional invoice in your browser — line items, tax and a live preview — then print it or save it as a PDF.
GeneratorenENImage to Text (OCR)
Extract text from a photo or screenshot with AI-powered OCR that runs entirely in your browser — pick a language, get editable, copyable text.
BilderENDart Counter
Free darts scoreboard for 301, 501 and 701 — up to 4 players, dart-by-dart input, bust detection, checkout suggestions and a fullscreen mode built for the oche.
Spaß & SpieleENYouTube Thumbnail Downloader
Paste any YouTube link or video ID to preview and grab its thumbnail in every available resolution.
Social MediaENTyping Speed Test
Measure your typing speed in WPM and accuracy over 15, 30 or 60 seconds — then beat your best score.
Tests & TrainingENClick Speed Test (CPS)
Find out how many clicks per second you can hit over 1, 5 or 10 seconds — then beat your best CPS.
Tests & TrainingENKeyboard Tester
Press every key to check it registers — spot stuck, dead or ghosting keys on any keyboard, right in your browser.
Tests & TrainingENNumber Memory Test
Memorise a number that grows one digit each round — see how many digits you can hold and beat your best level.
Tests & TrainingENTone Generator
Play a precise pure tone at any frequency — test speakers, hearing and tuning, right in your browser.
GeneratorenENBase64 Encoder / Decoder
Encode text to Base64 or decode it back — instantly and privately in your browser.
EntwicklerENColor Contrast Checker
Check text-vs-background contrast against WCAG AA & AAA — with a live preview.
FarbenENAge Calculator
Work out your exact age in years, months and days — plus days to your next birthday.
RechnerENUnix Timestamp Converter
Convert Unix timestamps to human dates and back — local time and UTC, in your browser.
UmrechnerENSlug Generator
Turn any title into a clean, URL-friendly slug — lowercase, hyphenated, accent-safe.
SEO & WebENSocial Media Character Counter
Count characters and words against X, Instagram, LinkedIn, TikTok and SEO limits live.
Social MediaENImage Resizer
Resize JPEG, PNG or WebP images to exact pixel dimensions — fast, private and right in your browser.
BilderENImages to PDF
Combine JPG and PNG images into a single PDF — one image per page, built privately in your browser.
PDFENURL Encoder / Decoder
Encode or decode URLs and query components instantly and privately in your browser.
EntwicklerENHash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text — privately in your browser.
EntwicklerENLorem Ipsum Generator
Generate placeholder text by paragraphs, sentences or words — instantly, free and right in your browser.
Text & SchreibenENRemove Duplicate Lines
Delete duplicate lines from any list or text, with trim, case and sort options — instantly in your browser.
Text & SchreibenENBMI Calculator
Calculate your Body Mass Index from height and weight in metric or imperial units, with an instant category and scale.
RechnerENCSS Gradient Generator
Build linear and radial CSS gradients with two colour stops, an angle slider and a live preview — then copy the code.
FarbenENMeta Tag Generator
Generate SEO, Open Graph and Twitter card meta tags for your page's <head>, ready to copy.
SEO & WebENNumber Base Converter
Convert integers between binary, octal, decimal and hexadecimal with live, error-checked fields.
UmrechnerENImage Color Palette Extractor
Pull the dominant color palette out of any image — right in your browser.
FarbenENQR Code Generator
Turn any link or text into a QR code — customise the colors and download a crisp PNG.
GeneratorenENJWT Decoder
Decode and inspect JWT header, payload and expiry — entirely in your browser.
EntwicklerENCron Expression Builder
Build and understand cron schedules in plain English, with the next run times.
EntwicklerENUUID Generator
Generate UUID v4, v7 and ULID identifiers in bulk — instantly and locally.
EntwicklerENJSON ↔ YAML Converter
Convert between JSON and YAML in your browser — nothing is uploaded.
UmrechnerENRobots.txt Generator
Build a correct robots.txt with allow/deny rules, sitemap and AI-bot presets.
SEO & WebENSERP Snippet Preview
Preview your Google title and description with pixel-accurate truncation.
SEO & WebENTip Calculator
Work out the tip and split the bill per person in seconds — presets, custom percentages and round-up included.
RechnerENDiscount Calculator
Find the final price after a discount — or the original price before it — with support for stacked discounts.
RechnerENVAT / Sales Tax Calculator
Add or remove VAT / sales tax from any price, with the tax amount shown separately and common rate presets.
RechnerENCountdown to Date
Count down the days, hours and minutes to any date — and share the link.
RechnerENDate Difference Calculator
Count the days, weeks and months between two dates.
RechnerENCSS Box-Shadow Generator
Design layered box-shadows visually and copy the CSS.
FarbenENGlassmorphism Generator
Create frosted-glass cards with live preview and copy-ready CSS.
FarbenENReadability Checker
Score your writing with Flesch Reading Ease and grade level — as you type.
Text & SchreibenENFancy Text Generator
Turn plain text into bold, italic, cursive and more for social bios.
Text & SchreibenENEXIF Metadata Remover
Strip GPS location and camera metadata from photos before you share them — entirely in your browser.
BilderENPassphrase Generator
Generate memorable, strong passphrases from random words — created locally in your browser.
GeneratorenENColor Palette Generator
Generate beautiful color palettes — press space, lock the ones you like, share the link.
FarbenENColor Shades & Tints Generator
Turn one color into a full 50–950 tint and shade scale, ready for Tailwind.
FarbenENColor Blindness Simulator
Preview how your colors and images look to color-blind viewers — all in your browser.
FarbenENText Diff Checker
Compare two texts and see exactly what changed — line by line or word by word.
EntwicklerENJSON ↔ CSV Converter
Convert JSON to CSV and back — handles nested objects, runs in your browser.
UmrechnerENJSON to TypeScript
Generate TypeScript interfaces from any JSON — instantly and locally.
EntwicklerENRegex Tester
Test regular expressions live, highlight every match, and understand what they do.
EntwicklerENSQL Formatter
Beautify and format messy SQL queries — across dialects, in your browser.
EntwicklerENMarkdown Editor
Write Markdown with a live preview and export clean HTML.
EntwicklerENImage Converter
Convert PNG, JPG, WebP and AVIF in your browser — batch, no upload, no file limit.
BilderENHEIC to JPG Converter
Convert iPhone HEIC photos to JPG or PNG — locally, nothing uploaded.
BilderENFavicon Generator
Turn any image, emoji or text into a complete favicon set — with a live tab preview and copy-paste HTML.
BilderENSchema Markup Generator
Build valid JSON-LD structured data for rich results — no code required.
SEO & WebENOpen Graph Preview
Preview how your link looks on Facebook, X, LinkedIn and Discord — and get the meta tags.
Social MediaENLoan & Mortgage Calculator
Work out monthly payments and see the full amortization schedule — with optional extra payments to find out how much interest you can save.
RechnerENCompound Interest Calculator
See how your savings grow with compound interest over time — add regular contributions and watch the year-by-year breakdown build up.
RechnerENTDEE Calculator
Estimate your daily calorie needs from your BMR and activity level, with targets for cutting, maintaining or bulking.
RechnerENSocial Media Image Resizer
Resize and crop images to the exact size for every social platform — Instagram, TikTok, YouTube and more.
BilderENTime Zone Meeting Planner
Find a meeting time that works across multiple time zones — a color-coded overlap grid for remote teams.
UmrechnerENSplit PDF
Extract page ranges or split a PDF into separate files — locally, no upload.
PDFENRotate PDF
Rotate PDF pages 90, 180 or 270 degrees — every page or just some.
PDFENCrop PDF
Trim the margins of a PDF — all in your browser.
PDFENOrganize PDF Pages
Reorder, rotate and delete PDF pages by dragging thumbnails — no upload.
PDFENPDF to Images
Convert every PDF page to a PNG or JPG image — locally, unlimited pages.
PDFENAdd Page Numbers to PDF
Stamp page numbers onto a PDF — position, format and font size, all local.
PDFENWatermark PDF
Add a text watermark to every page of a PDF — in your browser, no upload.
PDFENExtract Text from PDF
Pull the text out of a PDF to copy or download — locally, no upload.
PDFENRemove PDF Metadata
Strip author, software and hidden metadata from a PDF before sharing.
PDFENAI Background Remover
Remove the background from any image with AI — full resolution, free, no login, processed entirely on your device.
BilderENFake Data Generator
Generate realistic test data as CSV, JSON or SQL — unlimited rows, all local.
GeneratorenENBarcode Generator
Create EAN, UPC, Code 128 and Code 39 barcodes — download SVG or PNG, no watermark.
GeneratorenENSVG Background Generator
Generate organic blobs, mesh gradients and wave backgrounds as copy-ready SVG.
FarbenENNamed Color Finder
Find the closest CSS color name for any HEX, RGB or HSL value.
FarbenENTailwind Theme Generator
Generate a full Tailwind + shadcn/ui theme from a few base colors.
FarbenENBusiness & Username Name Generator
Generate brandable business names and available-looking usernames from a keyword — instantly and privately.
GeneratorenENDue Date Calculator
Estimate your due date and see how far along you are — privately, in your browser.
RechnerENAim Trainer
Click 30 targets as fast as you can to measure your aim in ms per target, targets per minute and accuracy — then share your score.
Tests & TrainingENSpacebar Counter
Count your spacebar presses — race the clock in a timed challenge or free-count forever, with live presses per second and a shareable score.
Tests & TrainingENAPM Test
Measure your Actions Per Minute, StarCraft-style — every click and keypress counts over a 30, 60 or 120 second run, with live APM and a shareable score.
Tests & TrainingENVisual Memory Test
Watch tiles light up on a grid, then click them all back from memory — the board grows each level. How far can you go?
Tests & TrainingENSequence Memory Test
A Simon-style sequence grows one step at a time — repeat the flashing pattern in order. One mistake ends the run.
Tests & TrainingENVerbal Memory Test
Words flash up one at a time — tap SEEN if it has appeared before, NEW if it is fresh. How many can you keep straight?
Tests & TrainingENChimp Test
Numbers appear across a grid, then hide — click them in order from memory. The famous test where chimpanzees beat most humans.
Tests & TrainingENDraw a Perfect Circle
Draw a freehand circle around the dot and get scored on how round it is — then challenge a friend to beat you.
Spaß & SpieleENHearing Age Test
Find your hearing age from the highest frequency you can still hear — rising tones from 8 kHz to 20 kHz, headphones on.
Tests & TrainingENRandom Picker Wheel
Spin a colorful wheel of names to pick a random winner — and share the exact wheel as a link.
Spaß & SpieleENLove Calculator
A just-for-fun FLAMES love match and compatibility score — same names always give the same result, so you can share it.
Spaß & SpieleENYes or No Oracle
Ask a question, get an instant YES, NO or a classic Magic 8-Ball answer — then share the verdict.
Spaß & SpieleENThis or That Decision Maker
Enter your options, hit decide, and let a fair random pick settle it — then share the link.
Spaß & SpieleENMM to Inches Converter
Convert millimeters to inches (and back) instantly — with common values, the exact formula and a reference table.
UmrechnerENInches to Feet Converter
Convert inches to feet (and back) instantly — with common values, the exact formula and a reference table.
UmrechnerENYards to Meters Converter
Convert yards to meters (and back) instantly — with common values, the exact formula and a reference table.
UmrechnerENSquare Feet to Square Meters Converter
Convert square feet to square meters (and back) instantly — with common values, the exact formula and a reference table.
UmrechnerENOunces to Grams Converter
Convert ounces to grams (and back) instantly — with common recipe values, the exact formula and a reference table.
UmrechnerENStone to KG Converter
Convert stone to kilograms (and back) instantly — with common body weights, the exact formula and a reference table.
UmrechnerENMG to MCG Converter
Convert milligrams to micrograms (and back) instantly — with common supplement doses, the exact formula and a reference table.
UmrechnerENKilojoules to Calories Converter
Convert kilojoules to calories (and back) instantly — with common food-label values, the exact formula and a reference table.
UmrechnerENML to OZ Converter
Convert milliliters to US fluid ounces (and back) instantly — with common values, the exact formula and a reference table.
UmrechnerENCups to ML Converter
Convert US cups to milliliters (and back) instantly — with common baking fractions, the exact formula and a reference table.
UmrechnerENPints to Liters Converter
Convert US pints to liters (and back) instantly — with common values, the exact formula, a reference table and the UK pint explained.
UmrechnerENAcres to Hectares Converter
Convert acres to hectares (and back) instantly — with common land sizes, the exact formula and a reference table.
UmrechnerENMPH to KM/H Converter
Convert miles per hour to kilometers per hour (and back) instantly — with common speed limits, the exact formula and a reference table.
UmrechnerENKnots to MPH Converter
Convert knots to miles per hour (and back) instantly — with common wind speeds, the exact formula and a reference table.
UmrechnerENPSI to Bar Converter
Convert psi to bar (and back) instantly — with common tire pressures, the exact formula and a reference table.
UmrechnerENKW to HP Converter
Convert kilowatts to horsepower (and back) instantly — with common car power figures, the exact formula and a reference table.
UmrechnerENAI Image Upscaler
Enlarge images 2× or 4× with an AI model that runs entirely in your browser — sharper results than plain resizing, no upload, no login.
BilderENAudio to Text (AI Transcription)
Transcribe voice memos, interviews and meetings with AI that runs entirely in your browser — free, no upload, with subtitle export.
Text & SchreibenEN