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Developer tools that stay in your tab

Format JSON, decode JWTs, convert timestamps, test regex, and handle everyday developer tasks without uploading your data. Search below and open the tool you need.

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Bit is short for binary digit, a contraction credited to statistician John Tukey.

JSON Formatter & Repair

JSON

Format, minify, and validate JSON — and auto-repair escaped JSON pasted from logs.

JSON Diff & Compare

JSON

Compare two JSON documents semantically, repair broken input, and export a JSON Patch.

Delimiter Tool

Text

Turn lines into a delimited list with dedupe, trimming, and quote options.

Base64 Encode & Decode

Encode

Encode and decode Base64 for UTF-8 text and images (PNG, JPEG, WebP, GIF, SVG), with data URLs.

URL Encode & Decode

Encode

Percent-encode query values or a full URI, with optional + for spaces.

JWT Decoder

Encode

Inspect a JWT header and payload in the browser. Decode only — signatures are never verified.

cURL Builder

HTTP

Parse a curl command into method, URL, headers, and body, then copy a rebuilt command. Nothing is sent.

Unix Timestamp Converter

Time

Convert epoch seconds or milliseconds to UTC, local time, and ISO 8601.

UTC Converter

Time

Convert local time to UTC and UTC to a chosen timezone, with ISO 8601, offset, and Unix epoch.

UUID Generator

Generate RFC 4122 UUID v4 values, with or without hyphens, and inspect a pasted UUID.

YAML ↔ JSON

Convert

Convert YAML to JSON and JSON to YAML entirely in the browser.

Regex Tester

Text

Test a JavaScript regular expression against text, with flags, matches, and capture groups.

Hash Generator

Encode

SHA-1, SHA-256, SHA-384, and SHA-512 checksums of text or a local file, via Web Crypto.

XML Formatter & Validator

Format

Format, validate, and minify XML while preserving attributes, comments, and element order.

SQL Formatter

Format

Beautify SQL with dialect-aware formatting, keyword casing, and configurable indentation.

CSV ↔ JSON Converter

Convert

Convert CSV, TSV, and delimited rows to JSON — or JSON arrays back to safe CSV.

HTML Formatter & Minifier

Format

Beautify HTML with Prettier or safely minify markup entirely in your browser.

HTML Encode & Decode

Encode

Encode and decode HTML named and numeric entities without interpreting markup.

CSS Formatter & Minifier

Format

Beautify CSS with Prettier or minify stylesheets entirely in the browser.

JavaScript Formatter

Format

Beautify JavaScript with Prettier, or compact a parsed script without a server round-trip.

Cron Expression Explainer

Time

Explain a Unix cron expression and list the next run times in your local timezone.

Text Diff & Compare

Text

Compare two texts by line, word, or character with additions and removals highlighted.

Column to List

Soon

Text

Convert a spreadsheet column into a comma separated list or SQL IN clause.