Compression Estimators

Estimate Brotli compression savings for any text payload and compare against GZIP and DEFLATE — shows exact byte savings, compression ratio, and bandwidth impact at scale. Free online Brotli compression estimator.

Estimate how small a set of files will compress to as ZIP — calculates Shannon entropy per file and predicts DEFLATE compression ratio. Free online ZIP size estimator, no signup required.

Paste any text and instantly see GZIP compressed size, compression ratio, and byte savings — useful for API payload planning and HTTP transfer optimization. Free online GZIP ratio checker.

Compare GZIP and Brotli compression savings for any text payload side by side — exact GZIP results via CompressionStream API and estimated Brotli results based on RFC 7932 benchmarks. Free online GZIP vs Brotli estimator.

Enter your service worker precache URL list to estimate total cache storage, GZIP and Brotli sizes per asset type, and get compression recommendations. Free online service worker cache size estimator, no signup required.

Convert between bytes, KB, MB, GB, TB, and binary units (KiB, MiB, GiB, TiB) with decimal and binary mode toggle. Supports bits, bytes, and all standard storage units. Free online file size converter, no signup required.

Select your file type and use case to get the best compression algorithm recommendation — covers GZIP, Brotli, ZIP, WOFF2, and format-specific codecs for 25+ file types. Free online compression recommender, no signup required.

Encode and decode text using Run-Length Encoding — shows compression ratio, longest run, and a verdict on whether RLE is effective for your input. Free online RLE encoder decoder, no signup required.

Model an API endpoint's response payload and estimate compressed wire size across GZIP and Brotli at various client loads — shows daily bandwidth savings with cache hit rate modeling. Free online REST API response size estimator.

Predict compressed output size from file type, content entropy, and chosen algorithm — GZIP, Brotli, DEFLATE, LZ4, Zstandard, XZ. Covers 24 file types with confidence ratings. No upload needed. Free online file size estimator after compression.

Enter file size, compression ratio, and monthly requests to calculate exact monthly and annual bandwidth savings — plus CDN cost reduction across AWS CloudFront, Google Cloud CDN, Azure CDN, Cloudflare, Fastly, and BunnyCDN. Free online bandwidth savings calculator, no signup required.

Estimate Zstandard compression savings vs GZIP and Brotli for any text payload — shows all 7 compression levels (1–22) with size, savings percentage, and a level tradeoff table. Free online ZSTD compression estimator.

Build a custom compression dictionary from sample data and compress a target string — shows dictionary vs GZIP vs dictionary+GZIP savings side by side. Free online dictionary compression simulator, no signup required.

Enter any text to build its Huffman tree, generate optimal prefix-free binary codes for each character, and see exact bit savings vs fixed 8-bit ASCII encoding — with interactive SVG tree and code table. Free online Huffman encoding visualizer, no signup required.

Visualize the GZIP and DEFLATE compression level vs size vs speed curve for levels 1–9 — enter file size and content type to see compressed sizes, speeds, and time-to-compress at each level. Helps choose optimal server config. Free online compression tradeoff visualizer, no upload needed.