🛠️ 20 Developer Tools
Free Online Developer Tools
Format JSON, encode Base64, generate cryptographic hashes, test regex, create secure passwords and UUIDs — every tool a developer needs, available instantly in your browser.
✅ No Login⚡ Real-time Results🔒 Web Crypto API🚫 No Server
About Logrith Developer Tools
Developer tools are utilities that programmers, DevOps engineers, and technical users need constantly — but shouldn't have to install software or sign up for services to access. Logrith's developer tool collection covers the most frequently needed utilities, all running in the browser with zero setup.
The JSON Formatter is one of the most-used tools — it validates JSON with precise error location, beautifies minified JSON for readability, and minifies formatted JSON for production. The key sorting feature is particularly useful for standardizing API response formats and configuration files.
For security-sensitive tasks, Logrith uses the browser's built-in Web Crypto API — the same cryptographic primitives used by the operating system itself. The Hash Generator uses SubtleCrypto.digest() for SHA-256/SHA-512, and the Password Generator uses crypto.getRandomValues() for cryptographically secure randomness. Neither tool has any external dependencies for their core functionality.
The Regex Tester uses the browser's native RegExp engine — the same one your Node.js or frontend JavaScript will use — so test results here match exactly what you'd get in production JavaScript code. This is a key advantage over server-based regex testers that may use different regex flavors (PCRE, Python re, etc.).
Frequently Asked Questions
Which hash algorithm should I use for password storage?
None of the hashes in this tool (SHA-256, SHA-512) are appropriate for password storage — they're too fast, which makes brute-force attacks easy. For password hashing, use bcrypt, Argon2id, or scrypt with a high cost factor. These tools are for checksums, data integrity verification, and non-security uses.
Is the JSON formatter safe for sensitive API data?
Yes. All JSON processing happens in browser memory only — no data is sent to any server. You can even disconnect from the internet after loading the page and the formatter will continue to work perfectly.
What's the difference between encodeURIComponent and encodeURI?
encodeURI encodes a complete URL, preserving characters like /, ?, &, =, # that have structural meaning. encodeURIComponent encodes everything except unreserved characters — use it for values inside query parameters. For query string values, always use encodeURIComponent.
Can I use these tools in a CI/CD pipeline?
These tools are web-based and interactive — they're designed for manual use. For CI/CD pipelines, use command-line tools like jq (JSON), openssl (hashing), or uuidgen. Logrith is designed for developer convenience in the browser, not scripted automation.
How do I test a regex that should match email addresses?
Open the Regex Tester and click the "📧 Email" button in the common patterns section to load a standard email regex. Then modify your test string. You can adjust the regex directly — all matches are highlighted in real-time as you type.
What Base64 variant should I use for JWT tokens?
JWT tokens use URL-safe Base64 (Base64url) — which replaces + with - and / with _, and omits padding = characters. Select "URL-safe Base64" in the encoding mode dropdown of the Base64 tool. The standard variant (+/=) should not be used directly in URLs or HTTP headers.
What is UUID v4 and when should I use it?
UUID v4 is a randomly generated 128-bit identifier in the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx. Use it as database primary keys, session tokens, file upload names, or any identifier that needs to be unique without central coordination. The collision probability is negligible — about 1 in 5.3 × 10^36.
How accurate are the password crack time estimates?
The estimates assume pure brute-force attacks through the entire keyspace. Real attacks often use dictionary attacks and rule-based generation that can crack common patterns much faster. The estimates give a theoretical upper bound — in practice, any password based on dictionary words or common patterns is much weaker than the entropy-based calculation suggests.
Can I format very large JSON files?
The JSON formatter works on any size that fits in browser memory — typically up to 50–100MB of JSON text without issues on modern devices. Very large JSON files (hundreds of MB) may cause browser tab memory limits to be hit. For extremely large files, use jq in the command line instead.
Are there plans to add an HTML formatter or XML formatter?
Yes, both HTML and XML formatters are on the roadmap. HTML formatting will use the browser's DOMParser to parse and reserialize with proper indentation. XML formatting will similarly leverage the DOMParser's native XML processing capabilities for browser-native results.