Developer Tools

Format, decode, validate.

Ten developer utilities that run entirely in your browser — nothing you paste ever leaves your device.

JSON Formatter & Validator

Beautify, minify and validate JSON with precise error messages.

JSON input

Output

Base64 Encoder / Decoder

Encode text to Base64 or decode it back — Unicode-safe.

Mode

Input

Output

Hash Generator

SHA-1, SHA-256 and SHA-512 digests via the Web Crypto API.

Algorithm

Input text

Digest (hex)

JWT Decoder

Inspect the header and payload of a JSON Web Token. Decoding only — signatures are not verified.

Paste a JWT

Header

Payload

RegEx Tester

Test a regular expression against sample text with live, highlighted matches.

Pattern

Flags

Test string

Matches

SQL Formatter

Tidy up a SQL statement with clause breaks and uppercased keywords.

SQL input

Formatted

SEO Meta & Open Graph Preview

Compose your meta tags and see live Google & social-card previews, then copy the markup.

Page metadata

Title

Description

URL

OG image URL

Google result

Social card

og:image

Generated tags

Unix Timestamp Converter

Convert between Unix epoch seconds and human-readable dates, both ways.

Epoch → Date

Unix timestamp (seconds)

Date → Epoch

Date & time

UUID Generator

Generate RFC 4122 version-4 UUIDs using the browser's crypto source.

Options

How many

Uppercase

Output

Cron Expression Builder

Build or pick common cron schedules.

Schedule

Preset

Min

Hour

Day

Month

DOW

Expression

CSS Minifier / Beautifier

Compress or format CSS in one click.

CSS input

Output

URL Encoder / Decoder

Percent-encode or decode URI components safely.

Mode

Input

Output

Lorem Ipsum Generator

Placeholder copy by paragraphs, sentences or words.

Options

Type

Count

Start with “Lorem ipsum…”