Developer tools.

Format, validate, and minify JSON with syntax highlighting.

Format and validate YAML files. Convert between YAML and JSON.

Prettify and validate XML documents with indentation.

Format SQL queries for PostgreSQL, MySQL, SQLite, and more.

Decode JWT tokens and inspect header, payload, and signature.

Generate UUIDs (v1, v4) in bulk. Copy and customize format.

Test regular expressions with live match highlighting and capture groups.

Build cron expressions visually. See next run times instantly.

Calculate subnet ranges, masks, usable IPs, and broadcast addresses.

Encode and decode Base64 strings. Supports text and file input.

Encode and decode URLs and query strings. Parse URL components.

Convert Unix timestamps to human dates and back. Any timezone.

View CSV files as formatted tables with sorting and filtering.

Convert CSV data to JSON arrays or objects with custom keys.

Convert JSON arrays to CSV format. Download as .csv file.

Generate secure passwords with custom length and character sets.

Generate QR codes for URLs, text, and more. Download as PNG.

Compare two text blocks side-by-side with highlighted differences.

Remove whitespace, special chars, duplicates, and transform case.

Validate Docker Compose YAML files and check for common issues.

Generate realistic fake API response data — users, products, orders, and more.

Build a complete mock REST API spec with endpoints, methods, and sample responses.

Infer a JSON Schema (Draft 7) automatically from any JSON object or array.

Validate JSON data against a JSON Schema. Shows all validation errors.

Paste OpenAPI 3.x / Swagger 2.x specs and browse endpoints in a clean UI.

Convert curl commands to fetch, axios, Python requests, Go, and more.

Create signed JWTs with HS256/HS512. Set custom claims, expiry, and secret.

Compute SHA-256, SHA-512, MD5, and other cryptographic hashes instantly.

Describe a pattern in plain English and get a working regex with explanation.

Paste broken or malformed JSON payloads and repair them automatically using AI. Inspect corrections and syntax fixes instantly.

Convert text between camelCase, snake_case, PascalCase, kebab-case, and more.

Convert numbers between binary, octal, decimal, hexadecimal, and any custom base (2-36).

Convert between Markdown and HTML with live preview. Supports GFM, syntax highlighting, and export.

Beautify or minify HTML code. Supports custom indentation, comment removal, and line count.

Pick colors visually, convert between HEX/RGB/HSL, and generate harmonious color palettes.