Compress Files Online, Free File Compressors
Make any file smaller without wrecking its quality: pick the compressor for your format.
How to compress files
To compress a file online, choose the compressor that matches your format: an image compressor for JPG, PNG and WebP. A PDF compressor for documents. A video compressor for MP4 and WebM, and an audio compressor for MP3. Each tool re-encodes the file at a lower bitrate or quality level to cut its size, often by 50–90%, while keeping it visually and audibly close to the original. GigAI's compressors run entirely in your browser, so files never leave your device, there are no upload limits, and results are instant.
9 tools for this task
Every one is free, private and runs in your browser. No sign-up.
Image Compressor
Shrink JPG, PNG and WebP images without a visible quality drop. Set the quality yourself, or compress to an exact target size like 100 KB. Free, entirely in your browser.
Compress PDF
Shrink a PDF's file size right in your browser. Pick a compression level, see exactly how much you saved, and download. No uploads, no watermark.
HTML Minifier
Minify HTML in your browser, collapse whitespace, strip comments and shrink page weight while safely preserving pre, textarea, script and style content. Nothing is uploaded.
CSS Minifier
Minify and compress CSS in your browser with csso. Merge duplicate rules, collapse shorthand and shorten colors, then see the exact bytes and percentage saved. Nothing is uploaded.
JavaScript Minifier
Minify and compress JavaScript in your browser with terser: mangle names, drop dead code and comments, keep class/function names when needed, and see the exact bytes saved. Nothing is uploaded.
SVG Minifier
Aggressively minify SVG online: collapse whitespace, strip comments, metadata and editor namespaces, and squeeze markup to a single line with a live before/after size and % saved. 100% in your browser.
SVG Compressor
Compress SVG in your browser and see the real transfer size, optimized bytes plus estimated gzip and Brotli payloads, the numbers that actually cross the wire. Nothing is uploaded.
Video Compressor
Compress video in your browser with FFmpeg, shrink MP4, MOV, WebM and MKV files with a simple quality slider, see the exact bytes and percentage saved next to a live preview, then download. Nothing is uploaded.
Audio Compressor
Compress audio and reduce file size in your browser, lower the MP3 bitrate and sample rate to shrink a WAV, MP3, M4A, FLAC or OGG down to a fraction of its size. See the exact before/after weight, preview the waveform, then download. Nothing is uploaded.
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Free, private and instant: everything runs in your browser.