All tools
Every tool runs locally in your browser, with no upload and no account. Pick one and get started right away.
Popular tools
PDF Tools — merge, split, organize & more, all localMerge, split, organize, compress, sign & more — 100% in your browser, no upload.Image Tools — compress, resize, crop & more, all localCompress, resize, crop, round-crop & remove EXIF — 100% in your browser, no upload.QR Code Generator — custom design, logo & branding, PNG + SVGCreate custom QR codes with shapes, gradients, styled eyes, a logo and branding text. PNG, SVG, EPS & PDF.
Files & media
Audio Tools — convert, cut, merge & extract, all localConvert, cut, change volume, merge & extract audio from video — 100% in your browser, no upload.CSV to Excel and Excel to CSV — in your browserCSV to .xlsx and back, with fitted columns, bold header and protection against formula injection.File Converter — images, PDF, audio & video, in your browserConvert images, PDF, audio and video locally: PNG, JPG, WebP, HEIC, SVG, MP3, MP4 and more.Subtitle converter: SRT to VTT and backSRT to VTT and back, with timing shift, encoding repair and a reading-speed check.Video Tools — compress, trim, mute & convert, all localCompress, trim, mute, rotate, resize & turn clips into GIFs — 100% in your browser, no upload.
Text
Case Converter — UPPERCASE, lowercase, Title Case & moreUPPERCASE, lowercase, Title Case, sentence case, camelCase, snake_case & more — local, language-aware.Image to Text (OCR) — extract text from a pictureRead text out of screenshots, scans and photos — German and English, locally in your browser.Lorem Ipsum Generator — placeholder text in secondsGenerate Lorem Ipsum placeholder text by paragraphs, sentences or words.Sort Lines & Remove Duplicates — local list cleanupSort lines, remove duplicates and empty lines, trim, reverse — with live statistics, no upload.Text Analyzer — readability score & statisticsReadability score, reading level, sentence and word statistics.Text Diff — compare two texts, 100% localCompare two texts line by line with word highlights, side-by-side or inline — no upload.Word Counter — count words, characters & reading timeCount words, characters, sentences, reading time and keyword density — in text or TXT/PDF/DOCX files.
Developer & data
Base64 Encode & Decode — text, files & data: URIs, localEncode and decode Base64 (incl. URL-safe), file to data: URI and back, 100% in your browser.Color Converter: HEX, RGB, HSL, OKLCHConvert between HEX, RGB, HSL, HSV, OKLCH, CMYK and CSS colour names, with harmonies and tints.Color Picker — pick a colour from an image and derive a palettePick colours from any image, read HEX, RGB and HSL, and derive a palette. Everything runs in your browser.Contrast Checker: WCAG AA & AAAWCAG contrast ratio with AA/AAA verdicts for normal text, large text and UI components.Cron Expression Explainer — crontab in plain EnglishA crontab line in plain words: field by field, with the next run times.CSV to JSON and back — in your browserConvert CSV to JSON and JSON to CSV, with table preview and per-row error list.Favicon Generator — ICO + PNG set from one imageOne image in, a complete favicon set out: ICO, PNGs, manifest and HTML snippet. Nothing is uploaded.Hash Generator — SHA-256 for files & text, localSHA-1/256/384/512 checksums of files and text, with expected-value check, 100% in your browser.JSON Formatter & Validator — local, with error positionFormat, minify and validate JSON with exact error position, 100% in your browser.JWT Decoder — read tokens locally, signature NOT verifiedDecode JWT header, payload and claims locally. Signature shown but never verified.Markdown to HTML and back — with a safe previewMarkdown to HTML and HTML to Markdown, with a live preview cleaned by DOMPurify.Number Base Converter – binary, octal, decimal, hexBinary, octal, decimal, hex and any base 2 to 36, exact via BigInt, with bit and two's complement view.Regex Tester — matches, groups and replace, without freezing the tabTest regular expressions with live highlighting, group inspection and replace preview, safely sandboxed.Slug Generator — clean URL slugs from any titleGenerate URL slugs with German umlaut mode (ä→ae), hyphen or underscore, live output — no upload.URL Encode & Decode — percent-encoding, localPercent-encode/decode URLs and query values (component or full URI), 100% local.UUID Generator — v4 and v7, single or bulkUUID v4 (random) and v7 (time-sortable) per RFC 9562, bulk up to 100, 100% in your browser.
Money & finance
Compound Interest Calculator — with savings planCompound interest with regular deposits, a yearly table and inflation adjustment.Currency Converter — live ECB exchange ratesConvert 30+ currencies with daily ECB reference rates.Electricity Cost Calculator — watts, kWh and standbyWhat a device costs per day, month and year — from watts or kWh, standby included.Gross-to-Net Salary Calculator — Germany & AustriaEstimate net salary after tax and social security (DE & AT).IBAN Checker – validate check digit, length and countryCheck an IBAN check digit and length, with the reason when it fails.Loan Calculator — monthly payment & amortizationPayment from term or initial repayment rate, remaining debt, monthly schedule with CSV export.Tip Calculator — split the bill down to the centTip, total and an exact per-person split — with a round-up mode for even totals.VAT Calculator — net, gross & VAT amountNet to gross, gross to net and VAT amount for DE, AT, CH or a custom rate.
Date & time
Age Calculator — exact age in years, months & daysExact age in years/months/days, total weeks & days, next-birthday countdown.Date Calculator — days between dates, and date plus or minusDays between two dates, plus date arithmetic in days, weeks, months, years or working days.Time Zone Converter – with meeting plannerConvert one time into many zones, with DST edge cases named and a meeting planner grid.Timer & Stopwatch — countdown, laps and alarmCountdown, stopwatch with laps and an alarm at a set time, with sound and a visible signal.Unix Timestamp Converter — epoch to date and backTimestamp to date and back, seconds/ms auto-detected, all IANA time zones, live clock.Work Hours Calculator – hours, breaks and payTimesheet with breaks, overnight shifts, decimal hours, optional pay and CSV export.Working Days Calculator — business days between two datesMon–Fri business days between dates, optionally excluding German public holidays.
Unit conversion
Everyday
BMI Calculator — body mass index & healthy weightBody mass index, WHO category and healthy weight range — metric or imperial.Calorie Calculator — daily needs after Mifflin-St JeorBasal and total daily energy after Mifflin-St Jeor, with goal and macro split.Fraction Calculator — add, simplify & moreAdd, subtract, multiply, divide and simplify fractions — exact, with worked steps.GPA Calculator — 4.0 scale, weighted by creditsWeighted GPA on the 4.0 scale, plus the grade needed for a target average.Password Generator — passwords & passphrases, localStrong random passwords and Diceware-style passphrases with an entropy strength meter.Percentage Calculator — % of, change & morePercent of a value, what percent, change and increase/decrease — with steps.QR Code Scanner — from image or cameraDecode QR codes from an image or your camera, with content type detection.Random Picker — wheel, numbers & shuffleWheel of names, random numbers with or without repeats, and list shuffling.Roman Numeral Converter — Roman to Arabic and backRoman to Arabic and back, from I to MMMCMXCIX, with breakdown and rules.Rule of Three Calculator — with the working shownProportional and inverse rule of three with the full working, step by step.Voice Recorder — record audio in your browserRecord voice notes and memos in the browser and save them as a file, with no upload.