Open, view, decompress, and extract GZIP (.gz) files directly in your browser - completely free, no software needed. Works for compressed log files, text documents, database dumps, and any single-file .gz archive. Need to browse a multi-file .tar.gz archive? Use the Archive Viewer. Working with other formats? Check out our 7Z Viewer, Archive Creator, or browse all file viewers.
or click to browse - works for .gz, .gzip, .tgz, and .log.gz files
Drag and drop your .gz file onto the upload area, or click to browse. Works for any GZIP-compressed file - logs, text, database dumps, JSON, XML, or web content. Up to 500 MB.
The file is automatically opened and decompressed in your browser. Text and log files appear inline with line numbers, search, and match navigation. Binary files show a hex preview of the first kilobyte plus the file metadata.
Use the search bar to find specific entries inside text content - jump through matches with the up/down arrows. Click Download Decompressed to save the original file to your device, or Copy to copy text directly to your clipboard.
Files are decompressed locally using pako (WebAssembly-grade speed). No server round-trip, no upload wait.
Perfect for compressed server logs (.log.gz). View inline with line numbers and live search.
Find text inside the decompressed content. Jump between matches with prev/next, see exact match counts.
Reads the original filename, timestamp, and source OS embedded in the GZIP header - handy for forensic work.
Detects images (PNG, JPG, WebP, etc.) and renders them inline. Shows hex preview for any other binary content.
All processing happens in your browser. Files never leave your device - safe for sensitive logs and confidential dumps.
GZIP was created by Jean-loup Gailly and Mark Adler in 1992 as a free replacement for the Unix compress utility. It uses the DEFLATE algorithm, combining LZ77 compression with Huffman coding. GZIP has become one of the most widely used compression formats, particularly for web content and log file storage - which is why a good .gz file opener is essential for anyone working with server logs or web archives.
The GZIP format includes a header with metadata (filename, timestamp, operating system) followed by compressed data and a CRC-32 checksum. This makes .gz files self-describing and verifiable. The format is standardized in RFC 1952 and supported by virtually all operating systems and programming languages.
Web servers like Apache, Nginx, and IIS use GZIP to compress responses before sending them to browsers. This reduces bandwidth usage and improves page load times. When you enable GZIP compression on your website, text-based files (HTML, CSS, JavaScript, JSON) can be reduced by 60-80% in size.
For image optimization, GZIP is less effective than format-specific compression. Consider using WebP or PNG compression for images instead. GZIP excels at compressing text, code, and structured data like XML and JSON files. To bundle multiple files into a single compressed archive, use our Archive Creator which produces ZIP, TAR, and TAR.GZ output. To browse a .tar.gz without extracting it first, open it in the Archive Viewer.
Upload your .gz file by dragging it onto the upload area or clicking to browse. The file is decompressed automatically in your browser - no software, no signup, no upload to any server. Text contents appear inline so you can read and search them; binary files can be extracted with one click using the Download Decompressed button.
Upload your .gz file here and click Download Decompressed to extract it to your device. The .gz format compresses a single file, so extraction produces one output file. For multi-file .tar.gz archives, use our Archive Viewer.
A .gz file is a single file compressed with GZIP (GNU ZIP), a widely used compression algorithm. Unlike ZIP or RAR which package multiple files into one archive, GZIP compresses one file at a time. .gz is commonly used for log files, database dumps, and web content compression. For multi-file archives, GZIP is typically combined with TAR (.tar.gz).
A .gz file is a single compressed file. A .tar.gz file (also called .tgz) is a TAR archive containing multiple files that has been compressed with GZIP. If you have a .tar.gz file, use our Archive Viewer to browse the contents.
Our online .gz opener works on any operating system with a web browser - Windows, Mac, Linux, or mobile. Just upload your .gz file and the contents are decompressed instantly. No need to install gunzip, 7-Zip, or any other software.
Yes - .gz is commonly used to compress server logs, application logs, and system logs. Our opener decompresses and displays these text-based log files, lets you search through the content with match navigation, and extracts them to your device. Perfect for inspecting Apache, Nginx, syslog, or AWS log exports without downloading uncompressed versions.
GZIP is fast and efficient, making it ideal for real-time web compression. Web servers compress HTML, CSS, and JavaScript with GZIP before sending to browsers, reducing transfer times by 60-80%. All modern browsers support GZIP decompression natively.
Yes - all decompression happens locally in your browser using JavaScript. Your files are never uploaded to our servers, which makes this safe for sensitive log files, database exports, and confidential documents. Still having trouble? Please contact us and we'll be happy to help!