Prettifies JSON and API response data with configurable indentation, sorting, and syntax validation — fixes malformed JSON and makes nested structures readable.
Content reviewed October 2026 · About Toolzum
Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
Format JSX with component indentation, prop alignment, and expression-container spacing. Read nested component trees at a glance — local processing, free, no signup.
Visualize JSON structure as an indented tree — see nested objects and arrays at a glance. Collapse deep branches to navigate large payloads — free, local, no signup.
Encode images to Base64 data URIs for CSS embedding and API payloads. Inline a logo without extra requests — local encoding, free, no signup.
Convert data between JSON, CSV, XML, YAML, and TSV with structure preserved. Migrate configs across stacks without rewriting — local PapaParse/xml2js/yaml parsing, free, no signup.
Paste the response: objects indent per level with collapsible structure. A 200-line webhook body becomes navigable in one pass.
It flags exact error positions (trailing commas, unquoted keys) and formats what's salvageable. Fix the flagged line, re-paste, re-format.
Yes — alphabetical key sorting stabilizes diffs between API versions. Sorted responses compare cleanly in reviews.
No — formatting runs locally in your browser. Payloads never leave your device.
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Diff Checker
Compares two input texts side-by-side, highlighting inserted, deleted, and changed lines with distinct background colors. Code never leaves your device — formatting and validation run locally in your browser.
IP Address Lookup
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