Developer Tools
Free developer utilities for JSON formatting, Base64 encoding and decoding, URL encoding, UUID generation, and JWT decoding in the browser.
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Developer Tools overview
Developer tools cover encoding, formatting, and generation essentials such as JSON formatting, Base64 encoding and decoding, URL encoding, UUID generation, and JWT decoding.
Paste your payload, inspect the output, and copy the result - all client-side, making these utilities safe for working with tokens, keys, and other sensitive data.
Developers spend a surprising amount of time on small mechanical tasks, and this category puts the essentials on one page. Format and validate JSON, encode and decode Base64, percent-encode and decode URLs, generate UUIDs, and decode JWTs - all without opening a separate application.
Every tool executes entirely in the browser, making it safe for inspecting tokens, keys, and test data you would rather not send anywhere. Paste a payload, read the result, and drop it straight back into your workflow. The companion guides explain the encodings and point out the common mistakes that trip people up.
Browse the current collection of tools below and filter by keyword to find the exact utility you need.
Base64 Decoder
developer
Decode Base64 strings back to plain text. Convert Base64 encoded data to readable text.
Base64 Encoder
developer
Encode text to Base64 format. Convert plain text to Base64 encoded string instantly.
JSON Formatter
developer
Format, validate, and minify JSON data. Copy formatted output with proper indentation.
JWT Decoder
developer
Decode JSON Web Tokens (JWT) and view the header and payload. Inspect token contents without any server calls.
URL Decoder
developer
Decode percent-encoded URLs and query strings back to their original readable form.
URL Encoder
developer
Encode URLs and text to a valid URL-encoded format. Escape special characters for safe use in URLs and query strings.
UUID Generator
developer
Generate random UUIDs (Universally Unique Identifiers). Generate multiple UUIDs at once for testing and development.
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