JSON Tools

Format, minify, validate, generate schemas, and convert JSON to YAML. Everything runs in your browser — nothing is sent to any server.

Format
Minify
Validate
Schema YAML
0 characters
Copy

JSON Workflows

#
JSON Schema Generator
Create a validation draft from API payloads
 Y
JSON to YAML
Convert config snippets and examples to YAML
 { }
Focused Formatter
Use the dedicated JSON formatting page

FAQ

API Debugging Config Files Data Exchange Log Analysis
Why does my JSON fail to parse?
Common causes: trailing commas, curly quotes (" instead of "), missing quotes, or mismatched brackets. The formatter highlights the error location so you can fix it step by step.
What's the difference between JSON and JavaScript objects?
JSON is the text representation of a JavaScript object. JSON is a standalone data format. JavaScript objects can contain functions and undefined values—JSON cannot.
Can I convert Excel or CSV to JSON?
Paste your table data and the tool converts it to JSON format, ready to import into other systems or APIs.
My formatted data looks broken—what happened?
Check for hidden characters or encoding issues in the original data. Try clearing formatting and pasting the raw text again.
How do I minify JSON for production?
Click the minify button to remove all whitespace and line breaks. Reduces payload size for faster API responses.
Try URL Encoder → · Try SHA-256 Hash →

Why Developers Use JSON Tools

JSON is easy for machines to read, but raw API responses are often compressed into a single line. Formatting adds indentation and line breaks so developers can inspect objects, arrays, nested fields, and unexpected values without copying data into an editor. This is especially helpful when debugging API responses, reviewing webhook payloads, checking environment configuration, or comparing logs from different systems.

This page combines formatting, minifying, and validation because those tasks usually happen together. A developer may first validate incoming JSON, then format it to understand the structure, then minify it again before saving it into a compact configuration value. Keeping the workflow on one page avoids switching between several tools for a simple debugging task.

What Makes JSON Invalid?

Trailing commas
JavaScript object literals may allow trailing commas, but JSON does not. {"a":1,} is invalid JSON.
Unquoted keys
JSON keys must use double quotes. {name:"Ada"} is a JavaScript-style object, not valid JSON.
Single quotes and smart quotes
JSON strings must use straight double quotes. Single quotes and curly quote characters from documents or chat apps can break parsing.
Hidden characters
Copied API output can contain invisible control characters. If valid-looking JSON fails, paste a smaller section first and narrow down where parsing breaks.