Tools for small jobs.

Check which versions satisfy a range like ^1.4 or ~2.0.3, and see what the range means in plain comparators.

Merge, dedupe and sort a list of IPs, CIDRs and ranges, subtract another list, and check whether an address is on it.

Turn an IPv4 or IPv6 CIDR into its address range, mask and host count, and split it into smaller subnets.

Chain tools into a pipeline: CSV to JSON, format, encode, hash and more, with every step's output shown.

Convert whole numbers between binary, octal, decimal, hex and any base up to 36.

Get MD5, SHA-1, SHA-256, SHA-384 and SHA-512 of text or a file, and check it against a hash.

Build a cron schedule by clicking, read it in plain English, and see exactly when it runs next.

Read a JSON Web Token's header and claims, see when it expires, and check an HMAC signature.

Make UUID v4, v7 or ULID IDs in bulk, and inspect any ID to see its version and timestamp.

Test a regular expression live, see every match and group, and read it in plain English.

Convert text to and from Base64, URL encoding and HTML entities.

Convert Unix timestamps to dates and back, in UTC and your time zone.

Fix pasted text in one go: smart quotes, odd spaces, extra blank lines, duplicates, sorting and case.

Make realistic test users, addresses and orders as JSON or CSV, the same every time from a seed.

Convert YAML to JSON and back, with errors pointed out by line.

Format SQL for Postgres, MySQL, SQLite, BigQuery and more, with your choice of keyword case and indent.

Convert CSV to JSON and back, with quoted fields, delimiter detection and typed values.

Write Markdown with GitHub's extras and see it rendered live, then copy the HTML.

Compare two texts line by line, with the changed words highlighted.

Count words and characters, see reading time, and check social post limits.

Pretty-print, minify and sort JSON, with errors pointed out by line.

Drop a screenshot and put it on a gradient with padding, a shadow and a browser or phone frame, ready to post.

Turn one image into favicon.ico, an Apple touch icon and app icons, with the HTML to add them, in one zip.

Design a 1200×630 share image with a title, colors and your logo, then download it as a PNG.

Drag to build a CSS gradient or box shadow, then copy the CSS or the Tailwind class.

Point your phone's camera at anything and get its hex code and closest color name, live.

See an image or a set of colors the way people with red, green or blue color blindness do.

Simplify any size to its ratio, and resize to a ratio without doing the math.

Turn one color into a full 50-950 scale and matching harmonies, then export it as CSS or Tailwind.

Shrink and resize images to WebP, AVIF or JPEG right in your browser; nothing is uploaded.

Check two colors against WCAG AA and AAA, and get the nearest color that passes.

Roll a random color and copy it as hex, RGB or HSL.

Combine PDFs, reorder, rotate or delete pages, or pull pages out into a new file; nothing is uploaded.

Make EAN-13, UPC-A and Code 128 barcodes and download them as PNG or SVG.

Turn text into a link that carries it, compressed and optionally locked with a password; nothing is stored anywhere.

See the hidden metadata in a photo, like GPS location, camera and date, then download a clean copy.

Count down to any date and time, and share a link that keeps counting for whoever opens it.

Scan a QR code with your camera or from a screenshot, and see what's inside before you open it.

Count the years, months, days and weekdays between two dates, or add days to a date.

Convert length, weight, temperature, volume, area, speed, data and time, all at once.

Find a meeting time that works across cities, hour by hour.

Turn a link, text or Wi-Fi login into a QR code you can download.

Make a strong random password; it never leaves your browser.

Add, subtract and divide feet, inches and fractions like 3' 5 5/8", rounded to the nearest 1/16 or finer.

Lay out the parts you need on the boards or sheets you have, with saw kerf, and see the offcuts and waste.

Tune a guitar, ukulele or bass with your microphone: see the note and how sharp or flat it is, with a metronome.

Paste a list of names and spin the wheel to pick one, with a link that keeps the list.

Measure your words per minute and accuracy, and see which keys you miss most.

Test your webcam, microphone level and speakers before a call, and record a short clip to hear yourself.