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JSONViewer Pro
Free online JSON formatter & tree client-side, no uploads
Free online JSON viewer and formatter. Paste JSON to instantly visualize, validate, search and navigate with an interactive tree. 100% client-side — JSON Viewer Pro is a fast, privacy-first JSON tool. Paste your JSON and instantly get: An interactive collapsible tree explorer One-click JSONPath generation Search across all keys and values Format, minify and validate Dark & light themes Everything runs in your browser. Your data never leaves your device.no data ever leaves your browser.
Hey hunters! 👋 Harshit here, the maker of JSON Viewer Pro.
I built this because I was tired of pasting sensitive API responses and config data into tools that send everything to a server. JSON Viewer Pro runs 100% in your browser — the code is a single HTML file on Cloudflare's CDN, there is literally no backend to send data to.
A few things I'm especially proud of:
The tree explorer — click any node and it collapses/expands instantly. Handles deeply nested JSON with thousands of keys without slowing down.
JSONPath on click — click any value and the path bar at the bottom shows the exact JSONPath ($.users[0].address.city). Copy it in one click. Saves so much time when writing queries.
It's fast — no React, no Vue, no build step. Pure vanilla JS. Loads in under 100ms on a slow connection.
I use it daily at work for debugging API responses. Would love to know what features you'd want next — better search? Export to CSV? YAML support?
Try it at jsonviewer.live and let me know what you think!
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About JSONViewer Pro on Product Hunt
“Free online JSON formatter & tree client-side, no uploads”
JSONViewer Pro was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #147 on the daily leaderboard. Free online JSON viewer and formatter. Paste JSON to instantly visualize, validate, search and navigate with an interactive tree. 100% client-side — JSON Viewer Pro is a fast, privacy-first JSON tool. Paste your JSON and instantly get: An interactive collapsible tree explorer One-click JSONPath generation Search across all keys and values Format, minify and validate Dark & light themes Everything runs in your browser. Your data never leaves your device.no data ever leaves your browser.
JSONViewer Pro was featured in Developer Tools (514k followers), GitHub (41.3k followers) and Tech (625.6k followers) on Product Hunt. Together, these topics include over 259.3k products, making this a competitive space to launch in.
Who hunted JSONViewer Pro?
JSONViewer Pro was hunted by Harshit Bagauli. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Harshit Bagauli