Yes, all JSON tools are free. Format, validate, minify, convert to XML or YAML, compare, view as tree, escape, sort keys, and merge—no registration or payment. All processing happens in your browser.

Validator passes but my API still rejects the payload—why?

Strict APIs often forbid trailing commas, comments, single quotes, or a UTF-8 BOM. Run the formatter, compare against the API schema, and hex-check the first bytes if parsers disagree.

What can I do with JSON tools?

Format and pretty-print JSON with indent and sort keys, validate syntax and see error position, minify for production, convert JSON to XML or YAML and back, compare two JSON objects (diff), view as a collapsible tree, escape or unescape strings, sort object keys alphabetically, and merge multiple JSON objects. The hub also links to JSON to CSV (the CSV tools hub has CSV to JSON).

Can I convert JSON to CSV?

Yes. The JSON tools hub links to JSON to CSV to flatten JSON to CSV. For CSV to JSON, use the CSV tools hub.

Is there a size limit for JSON?

Limits depend on your device's memory. Very large JSON (for example several MB) may take longer. For best results, we recommend JSON under 5MB for most tools.

Do JSON tools work offline?

After the page loads, all tools run in your browser with no server round-trips. You can use them without an internet connection for formatting, validation, minify, and conversions.

Tools hub

All-in-One JSON Tools

Format, validate, minify, diff, and convert JSON in seconds, including JSON to XML, YAML, and CSV.

Tools

Choose a tool below, or narrow by task and the full A–Z index.

JSON Diff

Compare two JSON objects

Use JSON Diff

JSON Escape / Unescape

Escape or unescape JSON strings

Use JSON Escape / Unescape

JSON Formatter

Pretty print and format JSON

Use JSON Formatter

JSON Merge

Merge two or more JSON objects

Use JSON Merge

JSON Minifier

Minify and compress JSON

Use JSON Minifier

JSON Sort Keys

Sort object keys alphabetically

Use JSON Sort Keys

JSON to CSV

Flatten JSON to CSV

Use JSON to CSV

JSON to XML

Convert JSON to XML

Use JSON to XML

JSON to YAML

Convert JSON to YAML

Use JSON to YAML

JSON Validator

Validate JSON and show errors

Use JSON Validator

JSON Viewer

Tree view and explore JSON

Use JSON Viewer

XML to JSON

Convert XML to JSON

Use XML to JSON

YAML to JSON

Convert YAML to JSON

Use YAML to JSON

Complete tool index

Alphabetical list of every tool on this hub. Each row links to the dedicated tool page—useful for scanning and site discovery.

About JSON Tools

We provide free online JSON tools for formatting, validating, minifying, converting, and editing JSON. Pretty-print and beautify JSON with custom indent (2 or 4 spaces or tab) and optional sort keys; validate syntax and see error position; minify for production; convert JSON to XML or YAML and back; compare two JSON objects with a diff; view JSON as a collapsible tree; escape or unescape strings; sort object keys alphabetically; and merge multiple JSON objects. For tabular data, use our CSV Tools to convert between JSON and CSV. No sign-up and no paywalls.

Use sort-keys plus minify before shipping configs—deterministic ordering makes Git diffs readable when paired with CI validators.

Browse the tools above to get started. For more help, visit our Contact or FAQ page.

Frequently asked questions

Are JSON tools free?: Yes, all JSON tools are free. Format, validate, minify, convert to XML or YAML, compare, view as tree, escape, sort keys, and merge—no registration or payment. All processing happens in your browser.
Validator passes but my API still rejects the payload—why?: Strict APIs often forbid trailing commas, comments, single quotes, or a UTF-8 BOM. Run the formatter, compare against the API schema, and hex-check the first bytes if parsers disagree.
What can I do with JSON tools?: Format and pretty-print JSON with indent and sort keys, validate syntax and see error position, minify for production, convert JSON to XML or YAML and back, compare two JSON objects (diff), view as a collapsible tree, escape or unescape strings, sort object keys alphabetically, and merge multiple JSON objects. The hub also links to JSON to CSV (the CSV tools hub has CSV to JSON).
Can I convert JSON to CSV?: Yes. The JSON tools hub links to JSON to CSV to flatten JSON to CSV. For CSV to JSON, use the CSV tools hub.
Is there a size limit for JSON?: Limits depend on your device's memory. Very large JSON (for example several MB) may take longer. For best results, we recommend JSON under 5MB for most tools.
Do JSON tools work offline?: After the page loads, all tools run in your browser with no server round-trips. You can use them without an internet connection for formatting, validation, minify, and conversions.