Developer Tools
Fast, browser-based utilities for everyday development tasks — no sign-up, no server, no rate limit.
Development work generates a constant stream of small, repetitive data tasks: inspecting an API token to check its expiry, formatting a raw JSON response to find the field you're looking for, generating a unique ID for a new database record. These tasks are trivial but they interrupt flow — especially when the best tools require an account, phone home with your data, or involve copying credentials into an unknown website.
Every tool here runs entirely in your browser. Once the page loads, there is no network traffic for your data — your JSON, tokens, and identifiers never leave your machine. That makes these tools safe to use with API keys, auth tokens, and internal payloads that you would not normally paste into an online service.
More developer tools are added regularly. If there's a utility you use daily that belongs here, reach out on Bluesky.
Tools in this category
JSON Formatter
Format, validate, and minify JSON instantly in your browser.
Open tool →UUID Generator
Generate cryptographically random UUID v4 values — single or bulk, instantly in your browser.
Open tool →JWT Decoder
Decode and inspect JWT tokens — view header, payload, and expiry status. No server, no data sent anywhere.
Open tool →Frequently Asked Questions
What developer tools are available here?+
This hub covers the most common developer utilities: JSON formatting and validation, JWT decoding, UUID generation, and more. All tools run entirely in your browser — no data is sent to a server, making them safe to use with API responses, tokens, and internal data.
Why decode a JWT in the browser?+
Decoding a JWT in the browser lets you quickly inspect its header, payload, and expiry without spinning up a server or pasting tokens into an unknown online service. This tool only decodes — it does not verify the signature, which requires the secret or public key.
When should I use UUID v4?+
UUID v4 is the right default for database primary keys, distributed event IDs, and session identifiers where you need uniqueness without a central counter. The random 122-bit entropy makes collisions practically impossible. For time-ordered IDs (better index performance in databases), look into UUID v7 or ULID.
Are these tools safe to use with production data?+
All tools in this hub run entirely in your browser using built-in JavaScript APIs — no data leaves your machine. That said, treat live production tokens and credentials with care: prefer a private/incognito window, and avoid pasting tokens that grant access to live systems into any online tool.