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

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

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

Text diffCompare two texts line by line, with the changed words highlighted.

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

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

Encode & decodeConvert text to and from Base64, URL encoding and HTML entities.

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

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

Time zonesFind a meeting time that works across cities, hour by hour.

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

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

Password generatorMake a strong random password; it never leaves your browser.

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

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

JWT decoder

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

Token

Decoded here in your browser; the token is never sent or put in the URL.

Small, free tools by Caleb Terry. No sign-up, nothing stored.