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JSON Formatter & Validator
Beautify, validate & minify JSON locally. Zero uploads.
Format, validate, and minify JSON instantly — entirely in your browser. Sort keys alphabetically, pinpoint syntax errors with line/column coordinates, and handle files up to 5MB. Zero uploads. Zero cookies. Zero tracking. Perfect for API responses, configs, and sensitive payloads.
Hey Product Hunt! 👋
I'm excited to share JSON Formatter & Validator. a tool I built because every developer deserves a JSON formatter they can actually trust.
The problem: Every time I needed to format or validate a JSON payload - API responses, config files, or sensitive data. I had to paste it into some random online tool. But I never knew where my data was going. Was it being logged? Stored? Sold?
And the ones that claimed to be "secure"? They still uploaded my data to their servers.
The solution: A JSON formatter that runs 100% in your browser - with developer-grade features:
🎨 Format / Beautify — Instantly structure messy JSON with 2-space, 4-space, or 1-tab indentation.
🔍 Validate with Precision — Pinpoints syntax errors with exact line numbers and column coordinates. Click the error, and it jumps your cursor right to the mistake.
📦 Minify / Compact — Condense JSON into a single inline string for production use.
🔤 Alphabetical Key Sorting — Recursively sort object keys A-Z while preserving data types and array indices. Perfect for consistent, readable configs.
⚡ Large File Support — Handles JSON files up to 5MB. For files above 100KB, syntax highlighting automatically switches off to keep interactions instant and lag-free.
📋 One-Click Copy — Copy clean, syntax-highlighted code directly to your clipboard.
🛡️ Zero Trust Architecture — No uploads. No cookies. No tracking. No remote network transmission. Your API keys, secrets, and payloads stay on your device.
Who is this for?
Developers debugging API responses
Engineers working with config files (package.json, tsconfig.json, etc.)
Anyone handling sensitive JSON data who values privacy
The key insight: Most online JSON tools upload your data to servers. We don't. We literally can't access your data because it never leaves your browser. That's the difference between a privacy policy and privacy by architecture.
I'd love your feedback! Try it out and let me know what you think.
Loved that everything runs right in the browser with no upload step. Merged a few PDFs and it was genuinely instant.
About JSON Formatter & Validator on Product Hunt
“Beautify, validate & minify JSON locally. Zero uploads.”
JSON Formatter & Validator was submitted on Product Hunt and earned 0 upvotes and 2 comments, placing #128 on the daily leaderboard. Format, validate, and minify JSON instantly — entirely in your browser. Sort keys alphabetically, pinpoint syntax errors with line/column coordinates, and handle files up to 5MB. Zero uploads. Zero cookies. Zero tracking. Perfect for API responses, configs, and sensitive payloads.
JSON Formatter & Validator was featured in Developer Tools (515.9k followers), Development (6k followers) and Development Language (1.8k followers) on Product Hunt. Together, these topics include over 79.7k products, making this a competitive space to launch in.
Who hunted JSON Formatter & Validator?
JSON Formatter & Validator was hunted by Instantconvert. 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.
Reviews
JSON Formatter & Validator has received 1 review on Product Hunt with an average rating of 5.00/5. Read all reviews on Product Hunt.
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