All Developer Utilities
Search and filter our complete suite of 46 offline, client-side tools.
Format, validate against Schema, and minify JSON with smart fixes.
Format, beautify, and layout SQL database queries with custom dialect parameters.
Run in-browser SQL queries against CSV or JSON files with a custom query engine.
Safely encode special characters for query strings and URLs.
Convert images client-side between standard formats (PNG, JPEG, WebP, GIF, BMP).
Compress and optimize images locally to reduce file sizes.
Combine two images side-by-side or stacked with custom spacing and alignment.
Generate customizable QR codes for URLs, Wi-Fi credentials, contact info.
Hash passwords and verify text against Bcrypt hashes locally and securely.
Generate the exact Git commands for common workflow scenarios interactively.
Live interactive HTML viewer and previewer with sandbox isolation.
Most Popular Utilities & Converters
These are the most frequently used developer utilities by engineers worldwide. They provide quick solutions for everyday tasks such as formatting raw JSON payloads, decoding JSON Web Tokens (JWT), encoding/decoding Base64 data, and generating random UUIDs.
By running entirely on your machine, these popular tools prevent accidental exposure of active JWT session payloads, client secrets, and sensitive user identification strings.
Key Features
- •JSON Formatter: Real-time syntax checking, schema validation, and key sorting.
- •JWT Decoder: Safely parse headers, claims, and signatures without exposing secrets.
- •Base64 Encoder: Convert text and image assets locally with instant downloads.
- •UUID Generator: Produce cryptographically secure UUID v4 or v7 identifiers in bulk.