Stopwatch
Free online stopwatch with lap times. Start, stop and split laps to the hundredth of a second; the fastest and slowest laps are marked.
Private by design: nothing leaves your browser
Free online tools that run in your browser
43 fast, no-nonsense tools for developers, designers, geocachers and everyday tasks. No sign-up, no ads, no uploads.
Recently used
Time & date
Stopwatch, countdown timer, time zones, age and date calculators, epoch conversion and hours worked. Every tool runs in your browser.
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Countdown timer
Free online countdown timer with an alarm sound and notification. Set hours, minutes and seconds or pick a preset such as 5 or 25 minutes.
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Current time & timestamp
See the current time, date and Unix timestamp live, and format them for any locale, with ISO 8601, UTC, week number and day of the year.
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Epoch converter New
Convert Unix epoch timestamps in seconds or milliseconds to a readable date and back. Converts whole lists of timestamps at once, too.
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Time zone converter New
Compare any number of time zones in one table and find the best meeting time with the day planner. Daylight saving time is applied for every zone.
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Date difference New
Calculate the number of days, weeks, months and years between two dates, including working days from Monday to Friday.
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Age calculator New
Calculate your exact age in years, months and days, the total days and weeks you have lived, and the days until your next birthday.
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Hours worked
Calculate the hours you worked today from your start time, end time and unpaid break, in hours and minutes and as a decimal number.
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Duration converter New
Convert durations between milliseconds, seconds, minutes, hours, days, weeks, months and years, and see them as days, hours and minutes.
Text
Count words, change the case of text, and sort, deduplicate or shuffle lines. Free, fast and private: your text never leaves your browser.
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Word counter New
Count the words, characters, sentences and paragraphs in your text, with reading time, speaking time and the most used words.
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Case converter
Convert text to lower case, UPPER CASE, Title Case, camelCase, PascalCase, snake_case, kebab-case or a URL slug. Works with multiple lines.
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Sort & deduplicate lines New
Sort lines alphabetically or by length, remove duplicate and empty lines, reverse, shuffle, trim and number lists of text online.
Developer
Format JSON, encode Base64 and URLs, generate hashes and convert number bases or CSS units. Free developer tools that run in your browser.
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JSON formatter New
Format, validate and minify JSON, and explore it in a collapsible tree with a filter for keys and values. Errors are shown by line and column.
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JSONPath tester New
Query JSON with JSONPath: select fields, filter arrays on conditions and sort the results. Includes examples and a cheat sheet.
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JSON to CSV converter New
Turn a JSON array into a table you can sort and filter, and download it as CSV for Excel or Google Sheets. Converts CSV back to JSON too.
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JSON diff New
Compare two JSON documents and see every added, removed and changed value with its path. The order of keys does not matter. Runs locally.
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JSON to TypeScript New
Generate TypeScript interfaces or types from a JSON example, with nested objects, arrays, optional keys and union types. Copy them in one click.
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Data converter New
Convert data between JSON, YAML, XML, CSV and TSV. Paste text or open a file, check the result and download it. Runs in your browser, nothing is sent.
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Base64 encoder
Encode text or files to Base64 and decode Base64 back to text. Supports UTF-8, emoji and the URL-safe alphabet.
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URL encoder New
Percent-encode text for use in a URL or decode an encoded URL. Choose between encoding a query value or a complete URL.
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HTML entities
Encode special characters to HTML entities, decode entities back to text or escape HTML. Choose named or numeric references.
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Hash generator New
Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text or files in your browser, and compare them with a checksum.
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Number base converter New
Convert numbers between binary, octal, decimal, hexadecimal and any base from 2 to 36, without losing precision on large numbers.
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CSS unit converter New
Convert CSS units: px to rem, em, pt, pc, cm, mm and inches and back, with an adjustable root font size.
Images
Edit photos, compress and convert images to WebP, and pick colors from any picture. Every tool runs in your browser, so your images stay private.
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Photo editor New
Edit photos in your browser: crop, rotate, resize, adjust brightness and colors, add filters, text, emoji and drawings, and export as PNG, JPEG or WebP.
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Image converter New
Convert images between JPG, PNG, WebP, AVIF, JPEG XL, GIF, BMP, TIFF, ICO and PDF, iPhone HEIC photos too. Many files at once, nothing is uploaded.
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Image compressor New
Make images smaller: compress, resize and convert many photos at once to WebP, JPEG or PNG, and see how much you save. Nothing is uploaded.
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Image color picker New
Find the colors of any image: pick a pixel with the eyedropper and get the main color palette in HEX, RGB and HSL, ready to copy.
Color
Convert HEX, RGB and HSL, check WCAG contrast and find the name of any color. Free color tools for designers and developers.
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Color converter
Convert colors between HEX, RGB and HSL, with a color picker and a live preview. Supports shorthand HEX and transparency.
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Contrast checker New
Check the contrast ratio of text and background colors against WCAG 2.2 AA and AAA for normal text, large text and user interface parts.
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Color namer
Find the name of any color code. See the closest color names from the NTC, HTML, X11, Pantone and ROYGBIV lists with their distance.
Generators
Generate strong passwords, UUIDs, QR codes and random picks from a list. Generated in your browser with secure randomness.
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Password generator New
Generate strong, random passwords and passphrases with the secure random generator of your browser. Choose length and character types.
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UUID generator New
Generate random UUID v4 or time-ordered UUID v7 identifiers in bulk, in upper or lower case, with or without hyphens.
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QR code generator
Create QR codes for links, text and Wi-Fi, with your logo, an image or an emoji in the middle. Choose colors and download as PNG or SVG.
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Random picker New
Pick one or more random items from your list, or shuffle the whole list. For raffles, teams and decisions, with fair, secure randomness.
Math
Calculate percentages and print multiplication tables. Simple, free math tools that work on any device.
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Percentage calculator New
Calculate a percentage of a number, what percentage one number is of another, and the percentage increase or decrease between two numbers.
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Multiplication table
Generate a multiplication table with any range of rows and columns, from the times tables 1 to 10 to tables up to 1000.
Network & device
See your public IP address, location and browser details. Free network and device tools.
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What is my IP
See your public IP address, the location and provider it belongs to, and the details of your browser, screen and connection.
Geocaching & puzzles
Convert coordinates and RD, decode keyboard and Caesar ciphers, translate Morse code and calculate letter values for geocache puzzles.
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Coordinate converter New
Convert GPS coordinates between decimal degrees, degrees and minutes, degrees minutes seconds and Dutch RD (Rijksdriehoek) coordinates.
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Letter value calculator New
Calculate the letter values of words for geocache puzzles: A=1 to Z=26, the sum per word, the total and the digital root.
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Caesar cipher & ROT13 New
Encode and decode text with the Caesar cipher or ROT13, and see all 25 shifts at once to crack a message without knowing the key.
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Morse code translator New
Translate text to Morse code and Morse code back to text, and play it as sound. Supports letters, digits and punctuation.
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Keyboard decoder
Decode substitution ciphers in geocache puzzles: replace letters with your own key, ignore characters and reverse characters or words.
Why Toolbox?
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Private by design
Every tool runs on your own device. The text, files and passwords you use are never uploaded, logged or stored on a server.
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Instant results
Results update while you type, without waiting for a server. Once a page has loaded, the tool keeps working when your connection drops.
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Free, without ads or accounts
No sign-up, no ads and no limits. Use every tool as often as you like and bookmark the ones you need.
Questions
Anything else? Read more about Toolbox.
Is Toolbox free?
Yes. Every tool is free to use, without an account and without limits.
Is my data safe?
Your data never leaves your device: the tools run in your browser with JavaScript. Only the IP address tool asks an outside service, IPinfo.io, for the details of your address.
Do the tools work on my phone?
Yes. Every page adapts to phones, tablets and desktops, and works with a keyboard and screen readers.
Do I need to install anything?
No. Every tool works in a modern browser on your phone, tablet or computer, with nothing to install and no account to create.