59 tools · private by design
Free online tools
Converters, formatters, calculators and file utilities that run entirely in your browser. Your files are never uploaded to a server, so they work offline and stay private.
Developer tools
Format, decode and inspect the things you work with every day.
OpenBase64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to text, right in your browser. Handles emoji and accented characters…
OpenHTML Entity Encoder & Decoder
Escape HTML so tags display as text, or decode entities back into characters. Supports all HTML5 named entities, in…
OpenImage to Base64
Convert images to Base64 data URIs in your browser. No upload. Copy the result for use in HTML or CSS.
OpenJSON Formatter
Format and minify JSON in your browser. Paste JSON, click Format or Minify. No data sent to any server.
OpenJWT Decoder
Decode a JSON Web Token to read its header, payload, and expiry. Runs entirely in your browser — the token is never…
OpenRegex Tester
Test a regular expression against sample text and see every match, capture group, and named group. Live results, no…
OpenURL Encoder & Decoder
Percent-encode text for URLs or decode an encoded URL back to readable text. Choose component or whole-URL mode, all…
OpenUUID Generator
Generate UUIDs (v4) in your browser. One click for a single UUID or multiple. No server, no tracking.
Text tools
Clean up, count, compare and transform text.
NewOpenOnline Notepad
A distraction-free online notepad that saves automatically in your browser. No account, nothing sent to a server. Open…
OpenCase Converter
Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, CONSTANT_CASE and more. Instant…
OpenLine Sorter & Duplicate Remover
Sort lines alphabetically or by length, remove duplicates, trim spaces and drop blank lines. Perfect for keyword…
OpenLorem Ipsum Generator
Generate placeholder text by paragraph, sentence or word count for mockups and layout tests. Copy in one click.
OpenText Diff Checker
Compare two blocks of text and see exactly which lines were added or removed. Ignore case or whitespace, and hide…
OpenURL Slug Generator
Turn titles into clean, SEO-friendly URL slugs. Handles accents, punctuation, stop words and length limits, and…
OpenWord Counter
Count words, characters, sentences, and paragraphs as you type, with reading time and the words you repeat most. Free…
Image tools
Resize, convert and compress images without uploading them.
NewOpenAdd Date Stamp to Photo
Stamp the date a photo was taken onto the image — glowing orange film-camera digits, a clean white date, or a caption…
NewOpenAdd Watermark to Photos
Watermark one photo or a whole batch with your name or logo. Choose position, size, opacity or a tiled pattern,…
NewOpenCompress Image to 100KB, 50KB, 20KB or Any Size
Reduce a photo to an exact file size in KB for application forms, passport and exam uploads, and email. Keeps the…
NewOpenEXIF Viewer
Check what hidden data a photo contains before you share it — GPS location on a map, camera, lens, date taken, serial…
NewOpenHEIC to JPG Converter
Convert iPhone HEIC photos to JPG or PNG in your browser — one file or a whole batch, downloaded as a zip. Private:…
NewOpenImage to Text Converter
Extract text from images, screenshots and scanned pages with free OCR that runs in your browser. 14 languages,…
NewOpenImage Upscaler
Increase image resolution 1.5x to 4x with smooth multi-step resampling and edge sharpening. Free, no watermark, and…
NewOpenRemove EXIF Data & GPS Location from Photos
Strip GPS location, camera serial numbers, dates and all other hidden metadata from JPG, PNG and WebP photos before…
OpenFavicon Generator
Turn one logo into every favicon size a website needs — a multi-resolution favicon.ico plus PNG icons for browsers,…
OpenImage Compressor
Compress JPG, PNG and WebP images in your browser with a live before/after preview. Nothing is uploaded — your photos…
OpenImage Format Converter
Convert images between WebP, PNG and JPEG in bulk. Drop several files at once — everything runs in your browser,…
OpenImage Resizer
Resize images to exact pixel dimensions or a percentage in your browser. Keep the aspect ratio, preview, and download…
OpenJPG to ICO Converter
Turn JPEG images into ICO icon files in your browser. Create favicons and Windows icons from JPG; choose layer sizes…
OpenPNG to ICO Converter
Convert PNG to ICO (icon) files in your browser. Choose sizes from 16 to 256 px and download one multi-resolution .ico…
OpenSVG to ICO Converter
Convert SVG vector images to ICO icon files in your browser. Rasterize your logo to multiple sizes for favicons and…
OpenWebP to ICO Converter
Convert WebP images to ICO icon files in your browser. Build multi-resolution favicons and Windows icons from WebP…
Files & folders
Rename in bulk, find duplicates and see what's using your disk — without uploading anything.
NewOpenBulk File Renamer Online
Rename many files at once with find and replace, numbering, prefixes, suffixes and case rules. Live preview, then…
NewOpenDuplicate File Finder
Find exact duplicate files in any folder by comparing their contents, not just names. See how much space copies waste…
NewOpenFolder Size Analyzer
See which subfolders, file types and individual files take up the most space in any folder. Sorted bar charts and a…
Audio, speech & subtitles
Read text aloud, convert audio and fix subtitle files in your browser.
NewOpenAudio Converter
Convert audio files to MP3 or WAV, change bitrate and sample rate, downmix to mono, or extract the soundtrack from an…
NewOpenSRT to VTT Converter & Subtitle Sync Fixer
Convert subtitles between SRT and WebVTT, shift timing earlier or later, fix frame-rate drift, or extract a plain-text…
NewOpenText to Speech Online
Paste any text and hear it read aloud with your device's voices. Adjust speed and pitch, follow along with word…
PDF tools
Merge and build PDFs entirely in your browser.
Converters
Units, timestamps, number bases and data formats.
NewOpenBarcode Generator
Create barcodes in Code 128, EAN-13, UPC-A, EAN-8, Code 39, ITF-14 and Codabar. Automatic check digits, download as…
OpenNumber Base Converter
Convert between binary, octal, decimal, hex and base 36 with exact precision for 64-bit values. Shows bit length and…
OpenQR Code Generator
Create a free QR code for a link, Wi-Fi network, email or phone number. Custom colours, adjustable size, PNG and SVG…
OpenUnit Converter
Convert length, weight, temperature, volume, data, speed and area between metric and imperial units. Instant, accurate…
OpenUnix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Detects seconds vs milliseconds automatically and shows ISO…
Calculators
Everyday maths: percentages, loans, dates and health.
OpenAge Calculator
Calculate your exact age in years, months, and days. Find out how many days you have lived.
OpenBMI Calculator
Calculate your Body Mass Index in metric or imperial units, with the result placed on the standard WHO category scale.
OpenDate Difference Calculator
Count the days between two dates, including working days only, plus an exact years/months/days breakdown. Timezone-safe.
OpenLoan & EMI Calculator
Calculate the monthly payment on a loan or mortgage, plus total interest and how much of your repayment is interest…
OpenPercentage Calculator
Work out what X% of Y is, what percentage one number is of another, and percentage increase or decrease. Three…
Security & privacy
Passwords, hashes and checks that never leave your device.
OpenHash Generator
Hash text with SHA-256 or SHA-1 in your browser. No data leaves your device.
OpenPassword Generator
Generate a strong, random password. Choose length and include numbers, symbols, and uppercase.
OpenPassword Strength Checker
Test how resistant a password is to guessing, with an entropy estimate, crack-time figure and specific weaknesses.…
Colour & design
Pick, convert and generate colours and palettes.
Random & fun
Dice, coins, names and decisions when you can't pick.
OpenCoin Flip
Flip a coin online for a random heads or tails. Instant, fair, and free.
OpenDice Roller
Roll one or more dice online. Supports 4, 6, 8, 10, 12, and 20-sided dice.
OpenRandom Name Generator
Generate random names for characters, babies, projects, or fun.
OpenRandom Number Generator
Generate random numbers instantly. Pick a min and max, get a random number in one click.
OpenYes or No Generator
Get an instant yes or no answer for quick decisions.