JSON Compressor & Decompressor
Estimate Gzip/Brotli compression, compress JSON to Base64, and decompress Gzip Base64 strings back to JSON. Optimize and debug API payloads.
Compress JSONNN
Decompress JSON (Gzip Base64)
Optimizing API Payloads
Benefits of Compression
Compressing JSON data significantly reduces network bandwidth usage, leading to faster API response times and improved application performance, especially for mobile users or large datasets. This tool helps you quantify those savings.
How Base64 Works
Gzip and Brotli produce binary data, which can't be directly pasted into text fields or embedded in JSON. Base64 encoding converts this binary data into a text string, making it safe for transmission and storage in text-based systems. You then decode it before decompressing.
Frequently Asked Questions
How do I decompress a Gzip Base64 string?▼
Paste your Gzip-compressed, Base64-encoded string into the Compressed Base64 Input panel and click Decompress. The tool automatically decodes Base64, applies gunzip, and attempts to format the JSON output.
What is the difference between minification and compression?▼
Minification removes whitespace and formatting from JSON, typically reducing size by 30–40%. Compression uses algorithms like Gzip or Brotli to encode data patterns, often reducing size by 70–90%. For production, you should apply both.
What is JSON decompression?▼
JSON decompression is the process of reversing compression (such as Gzip or Brotli) to restore the original JSON data so it can be read, parsed, or debugged.
Can this tool decompress Brotli-compressed JSON?▼
Yes. The tool supports decompression analysis for both Gzip and Brotli-compressed JSON payloads when provided in compatible encoded formats.
Why are JSON API responses often Base64 encoded?▼
JSON payloads are sometimes Base64 encoded after compression to safely transmit binary data over text-based protocols like HTTP or logs.
Does decompression change the JSON data?▼
No. Decompression restores the exact original JSON content that was compressed. Keys, values, and structure remain unchanged.
Can I decompress and then beautify the JSON?▼
Yes. After decompression, the tool automatically formats the JSON into a readable structure for easier inspection and debugging.
Is this tool safe for sensitive JSON data?▼
Yes. All compression and decompression happens locally in your browser. Your data is never uploaded, stored, or transmitted to any server.
Can I use this tool for debugging API payloads?▼
Yes. The tool is ideal for inspecting compressed API responses, logs, or encoded payloads to understand their original JSON structure.
Do I need to install anything to compress or decompress JSON?▼
No installation is required. The tool runs entirely in your browser and works on all modern devices.