Format JSON Online, Tree Viewer & Analyzer

↥Upload .json .log .txt

Decode nested JSON strings

Input

Output

Formatted JSON

JSONPrivateAnalyzer

Format JSON Online - Clean, Inspect, and Analyze

DiffForge formats messy JSON, escaped JSON strings, and CloudWatch-style log lines directly in your browser. Beautify or minify data, inspect nested objects with a collapsible tree, keep line numbers visible, and surface useful structure such as links, domains, keys, arrays, depth, and primitive counts without uploading anything.

Clean JSON from Logs and Escaped Strings

Paste raw JSON, JSON with comments, escaped JSON strings, or log lines that contain embedded payloads. DiffForge extracts the JSON candidate, decodes nested JSON strings when enabled, and returns readable formatted output.

JSON input

logINFO request completed { "payload": "{...}" }

parseExtract JSON object from mixed text

decodeDecode nested JSON string values

formatPretty print or minify output

Browser-only parser

Collapsible JSON Tree Viewer

Switch from raw formatted text to an expandable tree view for large payloads. Objects and arrays can be collapsed so API responses, event payloads, and nested configuration files are easier to scan.

Tree view

1▾ { Object(4) }

2 "level": "info",

3 ▾ "payload": { Object(3) }

4 ▸ "user": { Object(2) },

5 ▸ "flags": [ Array(2) ],

6 "url": "https://api.example.com"

Collapse nested data instantly

JSON Analysis with Links and Domains

After formatting, DiffForge summarizes the payload: total values, max depth, key count, objects, arrays, strings, numbers, booleans, nulls, and detected links. Full URLs stay visible and clickable for quick API endpoint inspection.

Analysis

Links3 found · 2 unique

Domainsapi.example.com · docs.example.com

Keys24 keys · 8 objects

Depthmax depth 5

https://api.example.com/v1/health

Line Numbers, Copy, and Download

Use line-numbered input and output panels for debugging parse errors or sharing exact references. Copy formatted JSON to the clipboard or download a .formatted.json file for handoff.

Input

1 {"ok":true,

2 "count":128,

3 "items":[...]}

Output

1 {

2 "ok": true,

3 "count": 128