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JSON Toolkit

Format, validate, minify, and convert JSON locally—ideal for API debugging and config work. Browse this curated wowTools collection of local browser utilities.

Overview

The JSON Toolkit groups the everyday utilities you reach for when an API response looks wrong, a config file is minified beyond recognition, or you need to move data between JSON and YAML. Every tool here runs in your browser: paste or type input, transform it, then copy or download—without creating an account or uploading payloads to wowTools.

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Why these tools

These tools cover the full local JSON loop: pretty-print for reading, validate for syntax errors, minify for compact request bodies, and convert when configs live in YAML. Related encoding helpers sit nearby when payloads need Base64 wrapping before transport.

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Frequently asked questions

Which JSON tool should I open first?
Start with JSON Formatter for everyday pretty-printing and a quick parse check. Use JSON Validator when you only need a clear syntax error, JSON Minifier for compact payloads, and JSON ↔ YAML when configs move between formats.
Is my JSON uploaded when I use this toolkit?
No. Formatting, validation, minification, and conversion run in your browser. Optional on-device history stores recent inputs only if you enable it, and never sends payloads to wowTools servers for these tools.
Why does my JSON fail validation?
JSON requires double-quoted keys and strings, disallows trailing commas and comments, and accepts only one top-level value. The validator and formatter report the first parser error so you can fix quotes, commas, or unexpected tokens.
Can I convert JSON to YAML and back?
Yes. The JSON ↔ YAML converter supports both directions with a swap action. Invalid input is rejected with a readable error before any conversion output is shown.
How does Base64 fit into a JSON workflow?
Some APIs and tokens wrap JSON inside Base64. Use Base64 Encode/Decode locally when you need to inspect or prepare that layer, then format the decoded JSON with the formatter.