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How to Convert HEIC to JPG on Mac — Free, No Install Required
Need to convert HEIC to JPG on Mac? Turn iPhone photos into JPG or PNG in your browser without installing software or uploading files.
Read guide100% Client-Side — Files never leave your device
Compress & Convert
Video, Image & Audio
Reduce file sizes by up to 95% entirely in your browser — no upload, free, private, works offline.
No Upload RequiredNo WatermarksNo Sign-upWorks Offline
Video Compressor
Compress & convert MP4, MOV, WebM, AVI and more. Trim, crop, resize.
MP4MOVWebMAVI
Get startedImage Compressor
Compress & convert JPG, PNG, WebP, HEIC and more. Crop, resize, strip metadata.
JPGPNGWebPHEIC
Get startedAudio Compressor
Compress & convert MP3, WAV, FLAC, AAC and more. Trim and adjust settings.
MP3WAVFLACAAC
Get startedTL;DR
LocalSquash is a free, open web app that compresses and converts video (MP4, MOV, MKV, WebM), image (JPEG, PNG, WebP, HEIC), and audio (MP3, WAV, FLAC, AAC) files locally in your browser using FFmpeg WebAssembly. No files are uploaded. Typical file size reduction is 50–95%. Works offline after the initial page load. No account, no watermark, no file size cap.
Why Use LocalSquash for File Compression?
LocalSquash is the only compression tool that processes files 100% locally in your browser. No uploads, no servers, no file size limits, and no sign-up.
100% Private
Files never leave your device. All processing happens locally in your browser.
Lightning Fast
Instant browser-based compression powered by FFmpeg WebAssembly. No upload delays.
100% Free
No fees, subscriptions, or watermarks. Unlimited uses with no sign-up required.
Large File Support
Handle files up to 2 GB. No server-imposed caps—limited only by your device’s available memory.
How to Compress Files With LocalSquash
Compress any file in three steps—no sign-up, no upload, no account needed.
1
Choose Tool
Select video, image, or audio compressor from the navigation.
2
Configure
Drop your file locally, then adjust quality and format settings.
3
Compress
One click — your compressed file downloads automatically.
Supported Formats
Powered by FFmpeg — supports 100+ media formats.
| Media Type | Supported Input Formats | Output Format | Typical Reduction |
|---|---|---|---|
| Video | MP4, MOV, WebM, AVI, MKV, WMV, FLV | MP4 (H.264) | 70–95% |
| Image | JPEG, PNG, WebP, HEIC, TIFF, BMP, GIF | WebP, JPEG, or PNG | 50–90% |
| Audio | MP3, WAV, FLAC, AAC, OGG, Opus, M4A | AAC, MP3, or Opus | 60–90% |
What Can You Compress With LocalSquash?
Built for creators, developers, and teams who need smaller files for email, chat apps, social media, and web publishing.
Compress Video for Email
Reduce video size for common email attachment limits in Gmail, Outlook, and other mail clients.
Compress Video for Discord
Shrink clips for Discord uploads with higher CRF, lower resolution, and trimming.
Compress Video for WhatsApp
Make videos smaller before sending so uploads finish faster and platform recompression is less aggressive.
Optimize Images for Web
Compress images for faster loading. Improve Core Web Vitals and SEO.
Compress Photos for Social Media
Optimize photos for Instagram, Facebook. Maintain quality, reduce size.
Compress Podcast Audio
Reduce podcast file sizes. Perfect bitrate for voice recordings.
Compression Guides
Practical walkthroughs for private video compression, browser-based conversions, and fixing HEIC compatibility headaches.
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Free Video Compressor That Actually Respects Your Privacy
Need a free video compressor with no upload? Learn how LocalSquash shrinks videos in your browser so private files stay on your device.
Read guideFrequently Asked Questions About LocalSquash
Quick answers about privacy, file limits, supported formats, and how browser-based compression works.
How Does Browser-Based Compression Work?
LocalSquash uses FFmpeg.wasm, a WebAssembly port of the industry-standard FFmpeg multimedia framework, to perform professional-grade compression directly in your browser with zero server-side processing. FFmpeg is widely used across streaming, editing, and transcoding workflows, which makes it a solid foundation for reliable local media processing.
Video compression uses H.264/AVC encoding with configurable CRF (Constant Rate Factor). CRF 18–23 gives near-lossless quality; CRF 28–35 maximizes compression. Compressed video exports as MP4 for broad compatibility, while trim-only exports keep the original container when possible.
Image compression supports WebP (30–50% better compression than JPEG), JPEG, and PNG with quality adjustable from 1–100%.
Audio compression offers AAC, MP3, and Opus with bitrates from 32kbps to 320kbps.
- FFmpeg WebAssembly
- The industry-standard FFmpeg multimedia framework compiled to WebAssembly, enabling professional-grade encoding to run entirely inside a web browser with zero server-side processing.
- CRF (Constant Rate Factor)
- A quality-based encoding parameter for H.264 video. Values range 0–51: CRF 18–22 is near-lossless, CRF 23–26 balances quality and size, CRF 28–35 maximizes compression.
- WebP
- A modern image format by Google offering 30–50% better compression than JPEG at equivalent visual quality. Supported by all modern browsers.
- AAC (Advanced Audio Coding)
- The successor to MP3, producing better audio quality at the same bitrate. Native codec for iOS, macOS, YouTube, and most streaming platforms.