JSONAPIDeveloper Tools
How to Fix JSON Before Sending It to an API
A fast way to format, validate and inspect JSON payloads before using them in API requests or webhooks.
5 min read
Common JSON mistakes
Most JSON errors are tiny: a trailing comma, a missing quote, a nested object in the wrong place, or a value that should be a number but was sent as text.
Formatting the payload before sending it makes the mistake visible.
Example: a webhook fails because one field is named userEmail in one request and user_email in another.
The ToolQ workflow
Use JSON Formatter first. If the data includes tokens or encoded values, decode those separately instead of guessing what they contain.
- Paste the payload into JSON Formatter.
- Pretty-print it and scan the nesting.
- Validate before sending the request.
- Decode JWT or Base64 values only when you need to inspect their contents.
Tools used in this guide
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