JSON Formatter Blob Viewer
View, share & convert JSON — 100% in your browser
5 followers
View, share & convert JSON — 100% in your browser
5 followers
Format, beautify, and view JSON online for free. Instantly convert JSON to Excel or Excel to JSON, and explore JSON Blobs with our free online tool.
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How does the JSON to Excel conversion handle deeply nested arrays, and is there any file size limit for the blob viewer on the free plan?
@nazife1727434 Great questions, thanks! 🙏
Nested arrays in JSON → Excel: Right now it maps an array of objects to rows/columns from the top-level keys, so flat and shallow structures convert cleanly. Deeply nested arrays/objects aren't auto-expanded into separate columns or sheets yet — they get serialized into a cell rather than exploded out. So for heavily nested data the honest answer is: flatten it first, or use the JSON → CSV tool for a quick tabular view. Proper nested flattening (dotted columns like address.city, and splitting nested arrays into their own sheet) is high on my list — this is exactly the feedback I was hoping for. 🙌
Blob viewer size limit: There's no free/paid plan — the whole site is free, and the viewer runs 100% in your browser, so there's no server-side size cap. It's limited only by your device's memory and handles multi-MB JSON comfortably. One note: above ~100 KB the editor turns off live syntax highlighting to stay fast, but it still parses and views fine. (The only place a real size limit applies is the optional "save & share" links, since those get stored.)
Appreciate you digging in — anything you'd especially want the Excel export to handle?
@nazife1727434 Update: just shipped this based on your comment 🚀
JSON → Excel now flattens deeply nested data into real columns instead of dumping it in one cell:
• nested objects → dotted columns (address.city)
• arrays of objects → expanded by index (items.0.sku, items.1.sku)
• scalar arrays → joined into a single cell (tags → "admin, editor")
Thanks again for the nudge — this made the export genuinely useful for real-world nested JSON. (And to recap the other Q: the blob viewer is fully free & client-side, no size cap beyond your device's memory.)
Love how clean the interface is, no clutter, just paste and instantly see formatted JSON. The one-click Excel conversion is a really thoughtful touch for anyone working with data exports.
@bedirhanuoox Thank you, that means a lot 🙏 "Paste and instantly see it" was the whole goal — I was tired of tools that made me click through menus or sign up just to read some JSON.
Since you work with data exports, two things you might like: the export now flattens nested JSON into proper columns (dotted headers like address.city), and there's a JSON → CSV tool too if you'd rather pipe it straight into a DB or script. Also everything runs 100% in your browser, so it's safe for real/exported data.
Curious — what formats do you export to most? Always looking for the next thoughtful touch to add. 🙌