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Compress JSON to a single line and watch exactly how many bytes you save
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Format, validate, and explore JSON — 100% client-side, private by design
Paste XML, get clean JSON — attributes, repeated elements and text nodes handled correctly
Turn CSV rows into JSON arrays of objects — quoted fields, custom delimiters and types handled for you
Flatten nested JSON into clean CSV columns — download Excel-ready .csv files in one click
Compress JSON to a single line and watch exactly how many bytes you save
Compare two JSON documents semantically — key order and whitespace never count as differences
Escape JSON strings for embedding — or unescape stringified logs back into readable JSON
One-click repair for broken JSON, JSON5, JS objects, Python dicts and truncated LLM output.
Turn any JSON payload into clean TypeScript interfaces or type aliases — merge arrays, detect optional fields and unions.
Parse YAML configs — K8s, Docker Compose, GitHub Actions — into clean JSON, then explore and edit visually.
Generate clean, idiomatic YAML from any JSON — smart string quoting, compact list style, 2 or 4 space indent.
Serialize JSON to well-formed XML — @_ attributes, repeated elements, text nodes and safe tag names.
Infer a standards-compliant JSON Schema from example data — formats, required keys, unions and additionalProperties control.
Query any JSON with live JSONPath evaluation — wildcards, recursive descent, slices and filters, all in your browser.
Every byte of insignificant whitespace — spaces, tabs, and newlines — is stripped, producing the smallest valid JSON representation.
Watch the original size, minified size, and percentage saved update in real time as you paste or type. Great for API payload budgets.
Just paste — the input is minified automatically. One click then copies the result or downloads a .min.json file.
Minification never touches keys, values, or types — only whitespace. The tree and table views are still there if you want to inspect first.
Drop formatted JSON into the input field — pasting alone minifies it instantly.
The stats bar shows original bytes, minified bytes, and the exact percentage saved.
Use "Copy" to grab the one-line JSON or "Download" to save it as a .min.json file.
How formatjson.net compares to traditional server-based JSON formatters and converters
| Capability / Standard | formatjson.net (Client-Side Workbench) | Traditional Server-Based Tools |
|---|---|---|
| Data Processing & Privacy | 100% local in-browser JavaScript — payloads never leave your device | Often uploads JSON/XML/CSV to remote backend servers |
| Confidential API Keys, JWTs & PII | Safe by design — zero network transmission, works offline via Service Worker | Risk of server access logs or third-party data retention |
| Broken & Truncated LLM JSON Repair | 1-click lexical state machine fixes comments, single quotes, trailing commas, Python literals & unclosed brackets | Fails with syntax error on non-strict JSON |
| 64-Bit Snowflake IDs & Leading Zeros | Preserves unsafe integers (> 2^53 - 1) and leading-zero codes ("00123") without precision loss | Silently truncates 64-bit IDs or strips leading zeros |
| Deep Nested Array Exploration | Interactive spreadsheet drill-down ([n items] →) with breadcrumbs, 3-state sorting & inline cell editing | Flat root-only tables or read-only trees |
| Large File Responsiveness | Chunked lazy tree (200 nodes/batch) + paginated table + 150 KB highlight guard | Main-thread DOM freeze on multi-megabyte files |
Minifying removes all whitespace and line breaks that are insignificant to parsers, producing a single-line JSON string. Typical formatted payloads shrink by 20–60% — the stats bar shows your exact savings in bytes and percent.
Never. Only insignificant whitespace is removed. Every key, string, number, boolean, and null stays byte-for-byte identical — JSON.parse produces the same structure either way.
Click "Beautify" to re-indent the JSON with two-space formatting, or use the JSON Formatter tool for the full tree and table view.
Smaller payloads mean faster network transfer, lower bandwidth costs, and quicker API responses. Minified JSON is also easier to embed in environment variables, CLI arguments, and single-line config fields.
Yes — there is no upload latency and no privacy risk. The minification happens in your browser via JSON.stringify, so even multi-megabyte files finish instantly and sensitive data never leaves your machine.