Developer hub
Developer tools for JSON, URLs, Base64 and identifiers
Format, validate, encode and decode common developer data without setting up a local script.
Use this developer tools hub for small data tasks that interrupt coding, testing or debugging. Paste the snippet, inspect the result, then move it back into your editor, API client or ticket.
Featured searches: json formatter for pretty printing api responses, json validator for malformed payloads, base64 encoder for request headers.
- json formatter for pretty printing api responses
- json validator for malformed payloads
- base64 encoder for request headers
- url encoder for query string values
Featured searches
developer-tools category
JSON formatter
Turn raw JSON into a clean, readable format and catch syntax errors before you ship.
developer-tools category
JSON Validator
Check whether JSON is valid and see the first syntax issue clearly, with line-by-line feedback for malformed input.
developer-tools category
Base64 Encoder
Turn text into Base64 for headers, API payloads, test data, and developer notes.
developer-tools category
URL Encoder
Encode text into percent-escaped URL form for query strings, path segments, and form values.
Popular tasks
Inspect JSON before you compare it
Choose json-formatter when you need readable structure, and json-validator when you need to catch syntax errors in a payload, fixture or config value.
JSON formatter
Check encoded values for transport
Choose url-encoder for query strings and path segments, or base64-encoder when a value must travel in a text-safe form such as an auth token or example header.
URL Encoder
Create unique test data fast
Use uuid-generator when you need distinct fixture records, log correlation values or throwaway IDs for a test run.
UUID Generator
How to choose a tool
When this hub helps
API debugging
Clean up request and response snippets before comparing them in a client, test suite or bug report.
Repro steps for tickets
Prepare compact, trustworthy snippets that other people can paste into their own environment.
Data transformation checks
Verify that encoded, decoded, compacted or expanded values still match the source data you expect.
All tools
developer-tools category
JSON Validator
Check whether JSON is valid and see the first syntax issue clearly, with line-by-line feedback for malformed input.
developer-tools category
JSON formatter
Turn raw JSON into a clean, readable format and catch syntax errors before you ship.
developer-tools category
JSON Minifier
Remove whitespace from JSON text and keep valid structure for compact sharing, storage, and transport.
developer-tools category
Base64 Decoder
Decode Base64 strings into readable text, bytes, or structured data from a clean input field.
developer-tools category
Base64 Encoder
Turn text into Base64 for headers, API payloads, test data, and developer notes.
developer-tools category
UUID Generator
Create version 4 UUIDs instantly for records, test data, and identifiers.
developer-tools category
URL Decoder
Decode percent-encoded URLs and query strings into readable text.
developer-tools category
URL Encoder
Encode text into percent-escaped URL form for query strings, path segments, and form values.
FAQ
When should I validate JSON instead of formatting it?
Validate first when the main question is whether the data is correct. Format it when the structure is valid and you want a clearer view of nested fields.
When do I choose Base64 instead of URL encoding?
Use Base64 for binary-safe text representation or when a system expects Base64 specifically. Use URL encoding for query parameters, path values and other URL parts.
Should I use these tools for production secrets?
No. Keep production secrets out of browser tools. Use them for test data, examples and values you are comfortable handling in the browser.