Base64 Encoder and Decoder
Convert plain text to Base64 and decode Base64 back to text with URL-safe and padding controls.
Developer tool - JSON Formatter and Validator
Clean malformed payloads, validate response bodies, and generate production-safe JSON output without leaving the browser.
JSON Formatter and Validator
Keyboard: Ctrl/Cmd + Enter format, Ctrl/Cmd + Shift + M minify, Ctrl/Cmd + Shift + V validate.
Input size: 0 bytes
Output size: 0 bytes
Paste JSON, then validate or format it.
Why engineers use this JSON tool
JSON issues usually surface at the worst time: right before deploy, during incident response, or while debugging a third-party API. This formatter is optimized for those moments with direct validation, minification, and quick copy actions.
What makes this implementation useful
- Validation and formatting are separate actions so you can check correctness before rewriting payload structure.
- Minify mode helps compare payload size changes and copy compact output into logs, fixtures, or API test tools.
- Optional key sorting helps stabilize diffs when teams compare JSON snapshots in code review.
FAQ
How do I inspect where JSON parsing fails?
Use Validate first, then correct the row and column shown in the error block before re-running format or minify.
Should I sort keys before sending JSON to logs or diffs?
Sorting keys helps produce stable snapshots during code review and CI diffs, especially for generated payloads.
Can I minify for copy-paste into API test bodies?
Yes. Use Minify to produce compact JSON quickly for fixtures, logs, and debugging payloads.
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How to Trace JSON Validation Errors in API Workflows
A practical debugging flow for malformed JSON payloads, schema drift, and validation edge cases in production APIs.
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