Tools

Free and secure web tools. All processing happens in your browser.

PDF Merger
Merge multiple PDF files into one. Runs entirely in your browser—files are never sent to any server.
JSON Formatter & Validator
Parse, format, and validate JSON. Pretty print, minify, and catch syntax errors. All in your browser.
JSON → TypeScript
Generate TypeScript interfaces from JSON. Convert JSON to TS types.
JSON ↔ YAML Converter
Convert between JSON and YAML formats. Bidirectional conversion.
CSV ↔ JSON Converter
Convert between CSV and JSON formats. Handles quoted fields.
Query String Parser & Builder
Parse URL query strings, edit parameters, and build new URLs.
Cron Generator & Explainer
Explain cron expressions in plain English. Generate from common presets.
Dockerfile Generator
Generate Dockerfiles for Node.js, Python, or Nginx static sites.
Code Diff Checker
Compare two code blocks. Highlight differences like a mini Git diff.
OpenAPI Snippet Generator
Generate curl, axios, and fetch snippets from any API endpoint.
JWT Decoder
Decode JWT tokens and view header and payload. Inspect claims, expiration, and more.
Base64 Encode / Decode
Encode text to Base64 and decode Base64 to text. All in your browser.
Regex Tester
Test regular expressions against text. See matches, groups, and flags.
UUID Generator
Generate UUID v4 identifiers. One or multiple. Cryptographically secure random.
Hash Generator
Generate SHA256 and MD5 hashes from text. All in your browser.
Unix Timestamp Converter
Convert Unix timestamp to date and vice versa. Supports seconds and milliseconds.
API Response Mock Generator
Generate fake JSON for user list, product list, and more. Mock API responses.
SQL Formatter
Format and beautify SQL. Pretty print, minify. Supports PostgreSQL, MySQL, and more.
Privacy Policy Generator
Generate a privacy policy from a template. Site name, email, cookies.