Archive Compression Tools
Compress files into GZIP, ZIP, and other archive formats entirely in your browser. No uploads, no server processing — all compression happens locally on your device.
Archive
11 tools
Multi-Folder ZIP Creator
Bundle multiple folders into a ZIP archive that preserves your complete directory hierarchy — uses webkitdirectory folder picker and DEFLATE level 9 compression via fflate. Free online multi-folder ZIP creator.
TAR.GZ Creator
Bundle and compress multiple files into a .tar.gz archive entirely in the browser using fflate — GZIP level 9 compression, POSIX ustar format, instant download. Free online TAR.GZ creator.
GZIP Compressor
Compress any single file to .gz format using the native browser CompressionStream API — zero server needed. Shows original size, compressed size, and compression ratio. Free online GZIP compressor.
Binary File Compressor
Compress any binary file — executable, database, firmware, or document — to ZIP (fflate, levels 1–9) or GZIP (CompressionStream) in the browser. Shows compression ratio. Free online binary file compressor.
ZIP File Inspector
Open and browse the contents of any ZIP archive without extracting — see file names, sizes, compression ratios, and methods in a sortable, searchable table. Free online ZIP file inspector.
ZIP Merger
Merge multiple ZIP archives into a single ZIP in the browser — deduplicates files with identical paths (first-wins) and shows a full conflict report. Free online ZIP merger.
ZIP to TAR.GZ Converter
Convert a ZIP archive to TAR.GZ format entirely in your browser — extracts ZIP contents and re-packages them as a .tar.gz using fflate GZIP level 9. Free online ZIP to TAR.GZ converter.
ZIP Splitter
Split a large ZIP archive into multiple smaller ZIP parts of a configurable max size — entirely in your browser using JSZip. Presets from 1 MB to 100 MB, custom KB/MB input, independent extractable parts. Free online ZIP splitter.
DEFLATE Compressor
Compress data using raw DEFLATE algorithm and view output as binary download, hex string, or Base64 encoded string — entirely in your browser using fflate. Free online DEFLATE compressor.
NDJSON / JSONL Compressor
Compress NDJSON/JSONL log files using GZIP — shows line count, valid/invalid JSON lines, and compression ratio. Optionally minifies each JSON line before compression. Free online NDJSON JSONL compressor, no signup required.
HAR File Compressor
Compress HTTP Archive (HAR) files by removing response bodies, cookies, and headers — then GZIP compress for 80–95% size reduction. Shows per-entry analysis. Free online HAR file compressor, no signup required.