Video Formats
Compress & convert almost any video format to MP4:
- • MP4 - Most compatible video format
- • MOV - QuickTime videos from iPhone/Mac
- • WebM - Web-optimized video format
- • AVI, MKV, WMV, FLV & more
✨ 100% Client-Side Processing
Compress & Convert Video, Image & Audio
Online Free & Private
Reduce file size and convert formats without quality loss—100% free browser-based compression & conversion with no uploads required.
Supports MP4, MOV, AVI, JPG, PNG, WebP, HEIC, MP3, WAV, FLAC & 100+ more formats • No server uploads • Works offline • Reduce file sizes by up to 90%
Video Compressor & Converter
Compress and convert MP4, MOV, WebM, AVI & almost any video format online free—reduce video file size by up to 90% without quality loss. Trim, crop, and convert to MP4.
H.264 encoding
Convert to MP4
Compress & convert video
Image Compressor & Converter
Compress and convert JPG, PNG, WebP, HEIC, TIFF & almost any image format online free—reduce image file size by up to 90%. Convert HEIC to JPG, PNG to WebP & more.
Convert to WebP, JPEG, PNG
HEIC to JPG converter
Compress & convert image
Audio Compressor & Converter
Compress and convert MP3, WAV, FLAC, AAC, OGG & almost any audio format online free—reduce audio file size by up to 90%. Convert WAV to MP3, FLAC to AAC & more.
Convert to MP3, AAC, Opus
WAV to MP3 converter
Compress & convert audio
Why Choose LocalSquash for File Compression & Conversion?
100% Private & Secure
Compress and convert files without uploading to servers—all processing happens locally in your browser. Your files never leave your device.
Lightning Fast Processing
Instant browser-based compression & conversion powered by FFmpeg WebAssembly. No upload/download delays—compress and convert files in seconds.
100% Free Forever
No hidden fees, no subscriptions, no watermarks. Unlimited video, image, and audio compression & conversion with no file limits.
No File Size Limits
Compress and convert files of any size. Limited only by your device's memory.
How to Compress & Convert Files Online
1
Choose Tool
Select video, image, or audio compressor & converter based on your needs.
2
Select & Configure
Drag and drop your file locally, then adjust quality, format, and compression settings.
3
Compress & Convert
Click the compress button and watch as your file is compressed and converted instantly, then downloaded automatically.
Supported File Formats for Compression & Conversion
Powered by FFmpeg, LocalSquash supports almost all media formats for compression and conversion—including these popular ones:
Image Formats
Compress & convert almost any image to WebP, JPEG, or PNG:
- • JPEG/JPG - Photos and web images
- • PNG - Images with transparency
- • WebP - Modern web format (best compression)
- • HEIC - iPhone photos
- • TIFF, BMP, GIF, RAW & more
Audio Formats
Compress & convert almost any audio to MP3, AAC, or Opus:
- • MP3 - Universal audio format
- • WAV - Uncompressed audio
- • FLAC - Lossless audio
- • AAC/M4A - Apple audio format
- • OGG, Opus, AIFF, WMA & more
Common Use Cases
📧 Compress Video for Email
Reduce video file size to under 25MB for email attachments. Perfect for sharing videos via Gmail, Outlook, or other email services.
💬 Compress Video for Discord
Get your video under Discord's 8MB or 50MB limit. Share gameplay clips, memes, and videos with friends on Discord servers.
📱 Compress Video for WhatsApp
Reduce video size for WhatsApp's 16MB limit. Share high-quality videos without WhatsApp's built-in compression ruining quality.
🌐 Optimize Images for Website
Compress images for faster website loading. Improve Core Web Vitals and SEO with optimized WebP images.
📸 Compress Photos for Social Media
Optimize photos for Instagram, Facebook, and Twitter. Maintain quality while reducing upload time and data usage.
🎵 Compress Audio for Podcasts
Reduce podcast file sizes for faster downloads. Perfect bitrate control for voice recordings and music.
Frequently Asked Questions
Is LocalSquash really free to use?
Yes, LocalSquash is 100% free with no hidden costs, subscriptions, or premium tiers. There are no file limits, no watermarks, and no registration required. We believe privacy-focused tools should be accessible to everyone.
How does browser-based compression and conversion work?
LocalSquash uses FFmpeg compiled to WebAssembly (WASM), which runs directly in your web browser. When you select a file, it's processed entirely on your device using your computer's resources. Your files are never uploaded to any server, making it completely private and secure. This applies to both compression and format conversion.
What file types can I compress and convert with LocalSquash?
LocalSquash supports almost all media formats for both compression and conversion. Video: MP4, MOV, WebM, AVI, MKV, WMV, FLV, and more (converts to MP4). Images: JPEG, PNG, WebP, HEIC, TIFF, BMP, GIF, RAW formats, and more (converts to WebP, JPEG, or PNG). Audio: MP3, WAV, FLAC, AAC, OGG, Opus, M4A, AIFF, and more (converts to MP3, AAC, or Opus).
How much can I reduce my file size?
File size reduction varies by file type and settings, but typical results are 50-90% smaller files. Videos often achieve 70-90% reduction, images 50-80%, and audio 60-90%. The compression is adjustable so you can balance quality vs. file size.
Is there a file size limit?
There are no artificial limits. The only constraint is your device's available memory (RAM). For most modern devices, files up to 2GB work well. Larger files may be slower or require more RAM.
Can I use LocalSquash offline?
Yes! After the initial page load, LocalSquash works completely offline. The FFmpeg WebAssembly module is cached in your browser, allowing you to compress files without an internet connection.
Why should I use LocalSquash instead of other compressors?
Unlike cloud-based compressors that upload your files to servers, LocalSquash processes everything locally. This means: 1) Complete privacy—your files never leave your device, 2) No waiting for uploads/downloads, 3) No file size limits imposed by servers, 4) Works offline, 5) Faster processing for large files.
Is LocalSquash safe and secure?
Absolutely. Since all processing happens in your browser, your files never touch our servers. There's no data collection, no tracking of your files, and no risk of data breaches. Your sensitive documents, personal photos, and private videos stay completely private.
How Browser-Based Compression Works
LocalSquash is built using FFmpeg.wasm, a pure WebAssembly port of the popular FFmpeg multimedia framework. This technology allows us to perform professional-grade video, image, and audio compression directly in your web browser without any server-side processing.
For video compression, we use H.264/AVC encoding with configurable CRF (Constant Rate Factor) values. CRF 18-23 provides near-lossless quality, while CRF 28-35 offers maximum compression. The output is always MP4 for maximum compatibility across all devices and platforms.
Image compression supports multiple output formats including WebP (recommended for web use with 30-50% better compression than JPEG), JPEG (universal compatibility), and PNG (lossless with transparency support). Quality is adjustable from 1-100%.
Audio compression offers AAC (best quality-to-size ratio), MP3 (universal compatibility), and Opus (superior compression, especially at low bitrates). Bitrate options range from 32kbps to 320kbps to suit any use case from voice memos to high-fidelity music.