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JSON Minifier

Shrink JSON files instantly by removing all whitespace. Paste or upload a pretty‑printed JSON file and get a fully valid, compact version that is smaller in size – ideal for API payloads, config files, or any situation where every byte counts. The side‑by‑side size comparison shows exactly how much space you saved.

🔒 Processing happens in your browser — files are never uploadedFree · No sign-up required

How to Use

  1. 1Click the upload area or drag & drop a .json (or .txt) file onto the page.
  2. 2Press the Minify button. The tool parses the file, validates it, and builds a minified version.
  3. 3Review the original size, the new size, and the percentage reduction. Click Copy to copy the minified JSON to your clipboard.
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Why use ShowPro's JSON Minifier?

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100% Private
Files never leave your browser. Zero server uploads.
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Instant Results
Processing happens locally — no waiting for uploads.
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Completely Free
No account needed. Use 5 times per day, always free.

Frequently Asked Questions

Does minification change the data?

No. The process only removes whitespace outside strings. All keys, values, and data types remain unchanged.

Can I minify a JSON file that contains comments?

Standard JSON does not allow comments. If your file contains them, the minifier will show a parsing error. Use a JSON validator first if needed.

Is the file uploaded to any server?

Absolutely not. All processing happens inside your browser – your file never leaves your device.