API Response Viewer
Paste a JSON API response and view it as a collapsible tree with type indicators per node.
How to use this tool
- 1Paste your raw JSON API response into the textarea.
- 2Click Parse and View Tree.
- 3Click any object or array node to expand or collapse it.
- 4Type indicators (string, number, boolean, null, array[N]) are shown next to each value.
About API Response Viewer
This API response viewer turns pasted JSON into a collapsible tree with type indicators so nested payloads are navigable.
Minified API dumps hide structure. A tree view is faster than pretty-print alone when objects nest deeply.
Paste your raw JSON API response into the textarea. Click Parse and View Tree. Click any object or array node to expand or collapse it. Type indicators (string, number, boolean, null, array[N]) are shown next to each value. Processing stays in your browser.
Use it while debugging webhooks and mobile clients. Huge payloads can stall the tab.
Does not call your API — paste a response. Invalid JSON fails parse with an error. Very large trees are slow.
Close the tab when you finish so sensitive input is not left in page memory.
Code examples
JavaScript (fetch)
const res = await fetch("https://api.example.com/users", {
headers: { Authorization: "Bearer " + token }
});
const data = await res.json();
console.log(JSON.stringify(data, null, 2));curl
curl -s https://api.example.com/users \
-H "Authorization: Bearer TOKEN" \
| python3 -m json.toolFrequently asked questions
Different tools use different definitions and parsers, so small gaps are common. API Response Viewer applies browser-native parsers and encoders appropriate to the job with one consistent browser-side rule set. Hidden characters, stricter syntax, or a different tokenizer usually explain the mismatch. Reduce the input to a minimal sample, then add pieces back until the difference appears. Match the rule your destination actually enforces.
Treat the error as a signal that this environment is stricter or configured differently. Browser APIs reject malformed structures early instead of guessing. Convert to a boring intermediate when it helps—plain UTF-8 text, PNG, WAV, or an unlocked PDF—then retry. If the intermediate works, the original encoding was the problem. Keep that minimal sample for the next regression check.
Runtimes disagree even when feature names match. Locales, parser strictness, codec builds, and library versions differ between your browser and CI. Export the exact bytes from API Response Viewer, hash them, and compare in the pipeline. Align normalization steps so both systems see the same input. Use the browser result as a reference artifact, then make CI match it.
Desktop apps win on deep feature sets, batch farms, and specialized hardware paths. API Response Viewer wins on zero install, private local processing, and speed for the everyday job on this page. Choose desktop software for multi-hour editorial work or exotic edge formats. Choose this tool when you need a correct result quickly without uploading. Many people do a quick pass here first, then open the heavy suite only if an edge case demands it.
Prefer API Response Viewer whenever the input is personal, unpublished, customer-owned, or under NDA, because the core transform stays in your browser via browser-native parsers and encoders appropriate to the job. Cloud services can still help for formats your browser truly cannot decode, but you must trust their retention policy. Strip secrets before any upload. Privacy is usually the reason to stay local—not a longer marketing checklist.
Start from the best original input you still have. Change only what the destination requires. Prefer lossless intermediates when you must convert twice. Because the tool is local, iterate in small steps: tweak one setting, re-run, compare. Spot-check a short sample before batching anything important.
No account is required for normal use. The core api response viewer transform runs in your browser on your device using browser-native parsers and encoders appropriate to the job. You get on-screen output, a copy action, or a download without a mandatory ToolBrigade upload for that step. Keep your browser updated. A few lookup utilities may call public reference APIs for live fields only—they still do not need your private documents.
Lighter text, code, calculator, and many image jobs work on modern phones. Large video encodes and huge PDFs are happier on a plugged-in laptop with more RAM. Fully client-side flows can continue offline once scripts are cached; live lookups still need network. If a run seems stuck, try a smaller sample, free memory by closing tabs, and confirm the input is not truncated. Prove the path on a short fixture before blaming the algorithm.