Developer Tools

JSON Formatter

Format, validate, minify and compare JSON.

Password Generator

Cryptographically secure random passwords.

Hash Generator

MD5, SHA-1, SHA-256, SHA-512 hashes.

Regex Tester

Live regex testing with match highlighting.

Base64 Encoder

Encode/decode text and files to Base64.

Diff Checker

Compare two texts side-by-side with highlights.

Markdown Editor

Live split-pane Markdown with HTML preview.

JWT Decoder

Decode JSON Web Tokens — header and payload.

URL Encoder / Decoder

Encode and decode URLs and query strings.

Number Base Converter

Convert between Binary, Octal, Decimal, Hex.

Mock JSON Generator

Generate realistic fake JSON data on demand.

CSV ↔ JSON Converter

Convert CSV to JSON or JSON to CSV.

UUID Generator

Generate v4 UUIDs and ULIDs in bulk.

Timestamp Converter

Convert Unix timestamps to human dates.

HTML Minifier / Beautifier

Minify or format HTML, CSS and JavaScript.

Password Strength Checker

Check password entropy and time-to-crack estimate.

AES Encrypt / Decrypt

Encrypt and decrypt text with AES-256 in browser.

Cron Expression Builder

Build cron schedules visually with next-run preview.

SQL Formatter

Beautify or minify SQL queries with keyword highlighting.

JWT Generator

Create and sign JWTs with HS256/HS384/HS512.

OpenAPI / Swagger Viewer

Paste any OpenAPI YAML/JSON and browse endpoints.

JSON to TypeScript

Convert JSON to TypeScript interfaces instantly.

HTTP Status Reference

Complete reference for all HTTP status codes.

Chart Maker

Build bar, line, area and pie charts. Export PNG.

DNS Lookup

Look up A, MX, TXT, CNAME records for any domain.

Code to Image

Screenshot code snippets as syntax-highlighted images.

Webhook Tester

Live endpoint to inspect incoming HTTP requests.

Website Carbon Footprint

Measure CO₂ emissions per visit for any public URL.

Barcode Generator

Generate CODE128, EAN-13, QR and more.