GZIP Compression Ratio Checker
Check GZIP compression ratio on JSON, HTML, CSS, and text payloads — live stats and bandwidth savings calculator on AboveTool.
API payload planning — bandwidth savings per day
Results update live as you type using the browser's native CompressionStream API — exact GZIP sizes, not estimates. Useful for checking whether enabling Content-Encoding: gzip on an API endpoint is worth the CPU cost.
About GZIP Compression Ratio Checker
GZIP Compression Ratio Checker estimates how much bandwidth GZIP saves on API payloads using the browser's CompressionStream API — exact sizes, not guesses. Paste JSON, HTML, CSS, or any text and see live compression ratio plus daily bandwidth savings at 1K, 1M, and 1B requests. Runs free in your browser at abovetool.com — no signup required.
How to use
- Paste text or try a preset (JSON API response, HTML page, or CSS stylesheet).
- Results update live — original size, GZIP size, ratio, and bytes saved.
- Review bandwidth savings at 1K, 1M, and 1B requests per day for API planning.
Features
- Live GZIP size using CompressionStream API
- JSON, HTML, CSS presets and file upload
- Bandwidth savings at 1K, 1M, and 1B requests/day
- 100% browser-based — no server upload
Frequently asked questions
How accurate are the GZIP sizes?
Sizes use the browser's native CompressionStream API — the same deflate algorithm servers use for Content-Encoding: gzip. Results are exact, not estimates.
What payloads work best?
Repetitive text like JSON API responses, HTML, and CSS compress well. Already-compressed binary (JPEG, PNG, ZIP) shows minimal savings.
Is my text uploaded to a server?
No. GZIP Compression Ratio Checker compresses entirely in your browser on abovetool.com.
Is GZIP Compression Ratio Checker free on AboveTool?
Yes. GZIP Compression Ratio Checker is free to use on abovetool.com with no account required.