🧑💻 Developer Tools
Essential tools for developers. Format JSON, encode/decode Base64 and URLs, generate hashes, UUIDs, decode JWTs and more.
Developer tools are utilities that programmers, system administrators, and technical users need regularly but that do not warrant installing dedicated software. They cover data encoding and decoding (Base64, URL encoding), data formatting and validation (JSON, CSV), security and identity (hashing, UUIDs, JWT inspection), time handling (Unix timestamps), and credential generation (passwords). Having these tools available instantly in a browser tab saves context-switching and speeds up development workflows.
All developer tools on this page use browser-native APIs where available: SubtleCrypto for hashing, crypto.getRandomValues() for UUID and password generation, JSON.parse() for JSON formatting and validation, and TextEncoder for encoding operations. This means the tools are fast, accurate, and your data never leaves your browser — important when working with sensitive tokens, hashes, or internal data.
These tools are used by back-end developers debugging API responses with malformed JSON, front-end developers encoding strings for query parameters, security engineers inspecting JWT tokens during authentication debugging, DevOps engineers converting Unix timestamps in log files, and anyone who needs a quick hash, UUID, or strong password without using the command line.
A few useful workflows: use the JWT Decoder to inspect the claims in a token without needing a secret key — useful for debugging auth flows; use the Hash Generator to verify file integrity or test password hashing behavior; use the Unix Timestamp Converter when reading log files that store timestamps as epoch seconds; and use the CSV to JSON converter to prepare data exports for use in JavaScript applications or REST APIs.
- →Formatting and validating JSON responses from APIs during development and debugging
- →Encoding and decoding Base64 strings for authentication headers or binary data
- →Generating SHA-256 or SHA-512 hashes for checksums and data integrity verification
- →Decoding JWT tokens to inspect headers and claims during authentication debugging
- →Converting CSV exports to JSON for use in JavaScript applications or APIs
JSON Formatter & Validator
Format, prettify and validate JSON online. Instantly beautify minified JSON with syntax highlighting.
Base64 Encoder
Encode text or data to Base64 format online. Fast, free, and works entirely in your browser.
Base64 Decoder
Decode Base64 encoded strings back to plain text online. Fast and free.
URL Encoder
Encode special characters in URLs and query strings online. Percent-encode text for safe use in URLs.
URL Decoder
Decode percent-encoded URLs back to readable text online. Unescape URL-encoded strings instantly.
Hash Generator
Generate SHA-1, SHA-256 and SHA-512 cryptographic hashes from any text online. Uses the Web Crypto API.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds.
UUID Generator
Generate random UUIDs (v4) online instantly. Generate one or multiple unique identifiers at once.
JWT Decoder
Decode and inspect JWT (JSON Web Token) payloads and headers online. No validation — browser-only.
CSV to JSON Converter
Convert CSV data to JSON format online. Paste your CSV and get formatted JSON instantly.
Password Generator
Generate strong, secure random passwords online. Customize length and character types.