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Image, PDF, video, audio, text, developer and world tools. Fast, free, and private: nothing is uploaded and nothing is installed.
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Every tool
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Add a header & footerAdd a header, footer and page numbers to a PDF free in your browser.Compress PDFsCompress up to 100 PDFs at once, free and in your browser.CV & Resume BuilderBuild a professional CV or resume free in your browser.Edit a PDFEdit a PDF free in your browser.Extract text from a PDFExtract text from a PDF for free in your browser.Fill PDF formsFill in PDF forms free in your browser.Invoice generatorCreate invoices free with five templates, your logo, drag-anywhere text and...Merge & split PDFsMerge several PDFs into one and split PDFs in your browser.PDF & imagesConvert images to PDF and PDF pages to images, free and in your browser.PDF editorOnline PDF editor in your browser: edit existing text, change fonts, add...Remove PDF passwordRemove the password from a PDF you can open, free in your browser.Resize a PDFResize a PDF free in your browser.Sign on PDFSign a PDF free in your browser.Watermark your PDFAdd text and logo watermarks to a PDF for free.Word ⇄ PDFConvert Word to PDF and PDF to Word free in your browser.Word ⇆ PDF converterConvert Word to PDF and PDF to Word right in your browser.
Image
Add a border to an imageAdd a border or frame to any image free in your browser.Add text to an imageAdd text to any image free in your browser.AI background removerRemove the background from images free in your browser with AI.Colour palette from an imageExtract a colour palette from any image free in your browser.Colour picker from imagePick colours from any image free in your browser.Compress imagesCompress up to 100 images at once for free.Convert imagesConvert up to 100 images at once for free.Crop an imageCrop an image free in your browser.EXIF editor & removerEdit or remove the EXIF metadata in a JPEG photo (camera, date, author, GPS...Favicon generatorTurn any image into a favicon free in your browser.Image editorOnline image editor with layers, text, shapes, brush, fill, live...Logo & badge makerMake a simple logo or badge in your browser.Passport photo makerMake a passport or visa photo: pick the size, add your photo, then zoom and...Pixelate or blur a regionPixelate or blur part of an image free in your browser.Resize an image to an exact sizeResize any image to exact pixel dimensions free in your browser.Resize for social mediaResize and reframe images to the exact size for Instagram, YouTube,...Resize imagesResize up to 100 images at once for free.Round image cornersRound the corners of up to 100 images at once for free.Signature makerCreate a handwritten signature by drawing or typing, and download it as a...Social media post makerCreate social media posts from scratch free in your browser.Text Behind ImagePut text behind the subject of any photo, free and in your browser.Watermark imagesAdd text and logo watermarks to up to 100 images at once for free.
Video
Add a watermark to videoAdd a logo or text watermark to a video free in your browser.Compress a videoCompress video for free right in your browser.Convert videoConvert video to MP4, WebM, MKV or MOV free in your browser.Extract audioExtract the audio from a video for free in your browser.GIF to videoConvert animated GIF to MP4 or WebM video free in your browser.Grab any frame from a videoGrab the first frame, last frame or any moment from a video as a...Merge clipsMerge and combine video clips into one video for free in your browser.Mic & webcam testTest your webcam and microphone in the browser before a call or recording.Mute videoRemove the audio from your videos for free in your browser.Round video cornersAdd smoothly rounded corners to a video free in your browser.Screen recorderRecord your screen with webcam overlay, microphone and computer sound free...Trim, cut & cropTrim, cut and crop a video for free in your browser.Video to GIFTurn a video into an animated GIF for free in your browser.
Audio
Audio converterConvert audio files for free in your browser.Audio speed changerPlay audio faster or slower with the pitch kept natural, and export a WAV at...Audio to SRT subtitlesTurn a voice recording into an SRT subtitle file with timestamps using your...Instrument tunerChromatic instrument tuner in your browser.Remove background noiseReduce background noise, hiss and hum from voice recordings free in your...Text to speechTurn text into speech for free in your browser using your device voices.Trim, cut & mergeTrim, cut and merge audio for free in your browser.Voice recorderRecord your voice or any audio for free in your browser with a live...Volume & normalizeChange audio volume, peak normalize, or even out loudness for free in your...
Text
Blackboard for smart boardsA realistic online chalkboard built for smart boards and touch displays.Case converterConvert text case for free in your browser: UPPERCASE, lowercase, Title...Emoji search & copySearch emojis by keyword and copy any one with a tap.Fancy text generatorTurn plain text into fancy Unicode styles: bold, italic, script, cursive,...Find & replaceFind and replace text for free in your browser, with ignore case, whole word...Markdown to HTMLConvert Markdown to HTML for free in your browser with a live preview, a...Online notepadOnline notepad with multiple notes, autosave, dark mode, themes, fonts, find...Remove duplicate linesRemove duplicate lines from a list for free in your browser.Remove extra spacesRemove extra spaces, trim line ends, fix indentation and tidy blank lines...Sort linesSort lines of text for free in your browser: alphabetical, reverse, by...Text compare & diffCompare two texts and see the differences for free in your browser.Text to handwritingConvert typed text into realistic handwriting on ruled or plain paper, with...Word & character counterCount words, characters, sentences, paragraphs and lines live in your...
Converters
Base converterConvert numbers between binary, octal, decimal, hexadecimal and any base...CSV to JSON & JSON to CSVConvert CSV to JSON and JSON to CSV free in your browser.Currency converterConvert between 160+ currencies free in your browser with daily exchange...Metric ↔ US converterConvert between metric and US customary units for free.Timezone converterConvert and compare times across timezones free in your browser.Unit converterConvert between units of length, weight, temperature, speed, area, volume,...
Calculators
Bill splitterSplit bills and group expenses free in your browser.BMI calculator in pounds & inchesBMI calculator using US units (pounds and feet/inches).Business days calculatorCount business days between two dates, add or subtract business days from a...Countdown & stopwatchCombined countdown timer and stopwatch in one page, with an alarm and lap times.Date difference calculatorDate difference calculator: days, weeks, months and weekdays between two...Discount calculatorWork out a sale price fast.GPA calculator with credit hoursGPA calculator for US students.Grade calculator - what do I need?Grade calculator.How Old Am I? Exact Age CalculatorAge calculator.Loan & EMI calculatorLoan and EMI calculator: find your monthly payment, total interest and total...Percentage calculatorPercentage calculator: percent of a number, what percent one number is of...
Money
Business BookkeepingFree, private business bookkeeping in your browser.Car loan calculatorUS car loan calculator.Compound Interest & Savings GrowthCompound interest and savings growth calculator.Compound interest calculatorCompound interest calculator.Credit card payoff calculatorCredit card payoff calculator.Debt Payoff PlannerDebt payoff planner for credit cards and personal loans.Gas Cost Calculator Road Trip & CommuteGas cost calculator for road trips and daily commutes.Mortgage calculator with PMI & taxesUS mortgage calculator.Net Worth SnapshotNet worth calculator.Paycheck calculator 2026 - all 50 statesUS paycheck calculator for 2026.Personal Money ManagerFree, private personal finance tracker in your browser.Rent vs Buy True Cost CalculatorRent vs buy calculator.Savings Goal CalculatorSavings goal calculator.US Inflation Calculator 1913 - 2026US inflation calculator using official CPI data from 1913 to 2026.US salary to hourlyConvert any US annual salary to hourly, daily, weekly, biweekly and monthly pay.
Developers
Base64 encode & decodeEncode and decode Base64 free in your browser, with full Unicode support,...Chat transcript format converterConvert chat transcripts between OpenAI messages JSON, Anthropic, ChatML,...Colour converterConvert colours between HEX, RGB, HSL and CMYK instantly.Cron builderBuild and understand cron expressions free in your browser.cURL to codePaste a curl command and convert it to JavaScript fetch, Python requests or...Diff checkerCompare two texts or code snippets free in your browser.Embedding & vector calculatorCompare two embeddings or vectors: cosine similarity, dot product, Euclidean...File hashGenerate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes free in your...Function calling schema builderBuild JSON Schema tool definitions for function calling visually.JSON formatter & validatorFormat, beautify, minify and validate JSON free in your browser.JSON to TypeScript, Pydantic & ZodPaste a JSON sample and generate TypeScript interfaces, Python Pydantic...JSONL viewer & validatorOpen, pretty-print and validate JSONL dataset files line by line.JWT decoderDecode JWT tokens free in your browser to read the header and payload, with...LLM token counter & cost estimatorCount tokens and estimate cost for GPT, Claude, Gemini and more.Minify & beautify codeMinify and beautify HTML, CSS and JavaScript free in your browser.Prompt cleanerClean pasted text for prompts and datasets: strip markdown, collapse...RAG text chunkerSplit long text into overlapping chunks for RAG and embeddings, by tokens,...Regex testerTest regular expressions free in your browser with live match highlighting,...URL encode & decodeEncode and decode URLs free in your browser, with component and whole-URL...UUID generatorGenerate UUIDs free in your browser: random v4, time-ordered v7 and Nil, in...
SEO
Keyword density checkerCheck keyword density and word frequency free in your browser.Meta & Open Graph generatorGenerate SEO meta tags, Open Graph and Twitter card tags free in your...Robots.txt generatorGenerate a robots.txt file free in your browser with user-agent rules, allow...Sitemap.xml generatorGenerate a valid sitemap.xml free in your browser from a list of URLs, with...Social card previewPreview how your link looks when shared on X, Facebook and LinkedIn, free in...
Security
Hash generatorGenerate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes free in your...Local-only secret noteKeep a password-encrypted private note that is stored only in your browser,...Metadata & EXIF removerRemove EXIF and metadata, including GPS location, from your photos free in...Password generatorGenerate strong random passwords and passphrases free in your browser.Secure key generatorGenerate strong random passwords, passphrases and hex or Base64 keys free in...Text encrypt & decryptEncrypt and decrypt text with a password free in your browser using...
Time
Alarm clockOnline alarm clock that runs in your browser with multiple labelled alarms,...Birthday ReminderBirthday reminder that runs in your browser.Countdown timerCountdown timer that runs in your browser with quick presets, a label and a...Document expiry trackerTrack expiry and renewal dates for passports, visas, ID cards, insurance,...Focus timerA clean, customisable focus timer for deep work.Habit trackerHabit tracker that runs in your browser with a two-week grid and streak...Pomodoro timerPomodoro timer that runs in your browser with custom focus and break...StopwatchOnline stopwatch that runs in your browser with lap and split times,...To-do listTo-do list that saves automatically in your browser, with reorder, edit,...US Federal Holidays 2025 & 2026 DatesComplete list of US federal holidays for 2025 and 2026 with exact dates.US Federal Holidays 2025 - 2035 DatesComplete list of US federal holidays 2025 through 2035 with exact observed...Vehicle remindersTrack renewal dates for your vehicle licence, insurance, driving licence,...
Generators
Barcode generatorGenerate barcodes free in your browser: Code 128, Code 39, EAN-13, EAN-8,...Business name generatorGenerate brandable business and startup name ideas free in your browser.Coin flipFlip a virtual coin online for free.Fake test dataGenerate fake test data free in your browser: names, emails, addresses,...QR code generatorCreate custom QR codes free for any link or text.QR code scannerScan any QR code with your camera or by uploading a photo, right in your...Random name & team pickerPaste a list of names and randomly pick a winner, split everyone into fair...Random number & diceGenerate random numbers, roll dice, flip coins and pick random names free in...Spin the wheelAdd your options and spin a colourful wheel to pick a random winner.Username generatorGenerate cool, gamer, professional or cute usernames free in your browser.
World
Braille translatorTranslate English text to Grade 1 Braille Unicode and back for free in your...EIN formatter & validatorFormat and validate US Employer Identification Numbers (EIN).Fake number detectorSpot fabricated numbers with Benford's Law.FIPS code lookupLook up FIPS codes for all US states and counties.Morse code translatorTranslate text to Morse code and Morse code back to text for free in your...NATO phonetic alphabetSpell out any word or text using the NATO phonetic alphabet (Alpha, Bravo,...Pig Latin converterConvert English text to Pig Latin and back for free in your browser.Proof to ABV converterConvert US alcohol proof to ABV percentage and back.Statute of Limitations by State - All 50 StatesStatute of limitations lookup by US state and claim type.US area code lookupLook up any US area code to find the city, state and region it covers, or...US clothing size converterConvert US clothing sizes to EU, UK, and international sizes for men, women,...US congressional districtsLook up how many US House of Representatives seats each state has, when...US county finderFind which US county any city is in, for free in your browser.US court system finderFind the federal district courts, circuit court of appeals, and state...US highway decoderDecode any US Interstate, US Route, or State Route number.US sales tax calculatorCalculate sales tax for any US state instantly.US shoe size converterConvert US shoe sizes to EU, UK, centimetres, and Japanese sizes for men,...US state abbreviationsLook up any US state abbreviation or full name for free.US tip calculatorCalculate tip amounts for any US bill.US ZIP code finderFind the ZIP code for any US city, or look up what city and state a ZIP code...
Sri Lanka
PAYE & salary tax calculatorSri Lanka APIT (PAYE) salary tax calculator for 2025/2026.Postal code finderFind Sri Lanka postal (ZIP) codes for major towns and district capitals like...Poya & Avurudu calendarOfficial 2026 Sri Lanka Full Moon Poya days and the Sinhala & Tamil New Year...Singlish to Sinhala UnicodeType Sinhala using English letters and get real Sinhala Unicode instantly,...Sinhala Unicode to legacy fontConvert Sinhala Unicode to the DL-Manel-bold legacy font free in your browser.Sri Lanka exchange ratesLive indicative exchange rates to the Sri Lankan Rupee (LKR) and a quick...
Why use Don's Tools
Your files never leave your device
Every tool runs in your browser using JavaScript and WebAssembly. There is no upload step, no queue and no copy of your file sitting on a server waiting to be deleted.
Free, with no account and no watermark
No sign-up, no trial, no paid tier and nothing stamped across your output. Open a tool, use it, close the tab.
Works on the device you already have
The same tools run on Windows, macOS, Linux, Android and iOS. Nothing to install and nothing to keep updated.
One place for the whole job
Over 190 tools covering PDFs, images, video, audio, text, code, SEO, security and everyday numbers, so you rarely need a second site.
Frequently asked questions
Are Don's Tools free?
Yes. Every tool is free with no watermark, no limits and no sign-up. Use them as much as you like.
Are my files uploaded anywhere?
No. The tools run inside your browser, so your files and text stay on your device and are never sent to a server.
Do I need to install anything or create an account?
No download, no plugin and no account. Everything works in any modern browser on Windows, Mac, Linux, Android and iOS.
What kinds of tools are here?
Image and PDF tools, a full PDF editor, video and audio tools, text utilities, unit and currency converters, developer and SEO tools, calculators, generators, security tools and world tools, with more added regularly.
Is there a file size limit?
There is no server limit because nothing is uploaded. The practical ceiling is your own device's memory, so a phone will handle smaller files than a laptop.
Do the tools work offline?
Once a tool page has loaded, most of them keep working without a connection. The few that look something up, such as currency rates, say so on the page.
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