Format unreadable single-line JSON into clean, indented 2-space, 4-space, or tab-aligned structures, sort keys alphabetically, and inspect nested objects in a collapsible JSON tree.
Fast, secure, and 100% free in your browser. No registration, file watermarks, or software downloads required.
Upload Document to JSON Formatter
Select or drag and drop your file here. Safe, private, and instant.
Follow these three straightforward steps to complete your document workflow in seconds:
Paste your raw or minified JSON string into the left editor pane or upload a .json file from your computer.
Select 2-Space, 4-Space, Tab Indentation, or switch to the Interactive JSON Tree Viewer to expand and collapse nested nodes.
Optionally sort object keys alphabetically (A–Z), strip null values, and copy or download your formatted .json file.
Instantly reformat dense API responses into clean, human-readable JSON with customizable indentation.
Navigate deeply nested JSON arrays and objects with color-coded data types, item counts, and 1-click node folding.
Recursively normalize object keys across every nesting level to make git diffs and API payload comparisons effortless.
Format sensitive JSON payloads locally in your browser or automate JSON formatting via POST /api/v1/pdf/json-formatter.
Developers can integrate JSON Formatter directly into applications and backend pipelines via POST https://goodpdftools.com/api/v1/pdf/json-formatter. API usage requires an X-API-Key header.
Generate your API Key & view JSON Formatter REST API Documentation →
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Paste your minified JSON into the input editor and select '2-Space' or '4-Space' formatting. The formatted JSON appears immediately in the right pane.
Yes! Click 'Tree View' above the output editor to switch to the interactive JSON Tree Viewer where you can expand and collapse individual objects and arrays.
No. Enabling 'Sort Keys Alphabetically (A–Z)' only sorts object property names; array element order is strictly preserved.
Yes! Send a POST request to /api/v1/pdf/json-formatter with your X-API-Key header to pretty-print and normalize JSON payloads programmatically.
Rated 4.8 out of 5 based on 1807 verified user ratings:
“Used JSON Formatter & Beautifier Online on GoodPDFTools for our daily document and API payload workflow. Instant browser processing with zero formatting loss and no watermarks.”
“The JSON Formatter & Beautifier Online studio and its /api/v1/pdf REST endpoint saved our engineering team hours of manual work. Fast, accurate, and Core Web Vitals are super responsive.”
“100% free, clean interface, and works directly in Chrome without installing heavy desktop software. Highly recommend JSON Formatter & Beautifier Online.”
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