100% in-browser · no upload
Compress videos & images without uploading
Shrinkly reduces video and image file size by 50–90% right in your browser. Drop an MP4, MOV, JPG or PNG, choose a quality or an exact target size, and download — free, with no watermark and no sign-up.
Why people use Shrinkly
Never uploaded
Everything runs on your device. Close the tab and nothing remains anywhere.
Exact target size
Need it under 10 MB for Discord or 100 KB for a form? Type the size, we do the math.
Hardware-fast
WebCodecs uses your GPU’s video encoder — often faster than uploading would be.
No limits, no watermark
No account, no daily cap, no logo stamped on your video. Free forever.
All compression tools
Pre-configured for the job — each tool opens with the right settings.
Video tools
- Free Online Video Compressor Compress MP4, MOV, WebM and MKV videos in your browser. Shrink video size by 50–90% with no upload, no watermark and no sign-up. Choose quality or a target size.
- Compress MP4 Files Online Make MP4 files smaller in seconds. Free in-browser MP4 compressor with H.264 output, target-size mode and no upload or watermark. Works on phone and desktop.
- Compress MOV Videos (iPhone & QuickTime) Reduce MOV file size from iPhone, Mac and QuickTime in your browser. Converts to a smaller MP4 or keeps quality high. No upload, no app, no watermark.
- Compress WebM Videos Shrink WebM videos in the browser. Re-encode to smaller VP9 WebM or universal MP4, choose quality or target size. Free, private, no upload.
- Compress MKV Files Reduce MKV file size and convert to MP4 in your browser. Free MKV compressor for OBS recordings and videos. No upload, no watermark.
- Convert MOV to MP4 Convert MOV to MP4 online without uploading. Turn iPhone and QuickTime videos into compatible H.264 MP4 files, and make them smaller at the same time.
- Compress Video for Discord (Under 10 MB) Make any video fit Discord’s 10 MB free upload limit. Automatic bitrate and resolution for the best quality under 10 MB. No upload, no Nitro needed.
- Compress a Video for Email Shrink a video to email it as an attachment. Pre-set for Gmail’s 25 MB and Outlook’s 20 MB limits. Free, private, no upload or sign-up.
- Compress Video for WhatsApp Prepare videos for WhatsApp so they send fast and look sharp. 720p MP4 preset, no upload, no watermark. Works on iPhone, Android and desktop.
- Compress Video to 10 MB Compress any video to under 10 MB with an exact target-size encoder. Auto-selects the best resolution. Free, no upload, no watermark.
- Compress Video to 25 MB Shrink any video to under 25 MB for email, forms and uploads. Exact target-size encoding in your browser. Free, private, no watermark.
Image tools
- Free Online Image Compressor Compress images in bulk in your browser. Reduce JPG, PNG, WebP and AVIF size by up to 90% with MozJPEG, OxiPNG and WebP encoders. No upload, no limits.
- Compress JPG / JPEG Images Compress JPG and JPEG photos by up to 80% with MozJPEG in your browser. Batch support, quality slider, target KB. No upload, free.
- Compress PNG Images Compress PNG images while keeping transparency. Lossy 256-colour quantization plus OxiPNG optimisation, in your browser. No upload, batch support.
- Compress WebP Images Make WebP images smaller with libwebp in your browser. Quality slider, resize and target size. Free, private, batch compression.
- Compress Image to 100 KB Reduce a photo to under 100 KB for forms, applications and uploads. Automatic quality search hits the exact size. No upload, works on phone.
- Compress Image to 50 KB Compress a photo or signature to under 50 KB for exam and government forms. Exact-size JPG output, in your browser, free.
- Compress Image to 200 KB Reduce JPG, PNG or WebP images to under 200 KB while keeping them sharp. Automatic quality search, batch support, no upload.
- Convert JPG to WebP Convert JPG to WebP in bulk in your browser. Typically 25–35% smaller than JPG at the same quality. No upload, ZIP download.
- Convert PNG to WebP Convert PNG to WebP with transparency preserved. Much smaller files for websites and apps. Bulk conversion in your browser, no upload.
How to compress a video or image online
- Choose Video or Images and drop your files into the box.
- Pick a quality preset or enter an exact target size (MB for video, KB for images).
- Press Compress — your files are processed on your own device.
- Preview the result and download the smaller file, or a ZIP for multiple images.
Shrinkly vs. typical online compressors
| Shrinkly | Upload-based websites | |
|---|---|---|
| Files uploaded to a server | Never | Yes |
| File size limit | None (device memory) | Often 100 MB – 2 GB free |
| Watermark | None | Sometimes on free plans |
| Waiting for upload/download | No | Yes |
| Works offline after loading | Yes | No |
How much smaller will my files get?
A typical one-minute 1080p phone video (about 130 MB) comes out around 35–40 MB at Medium quality, or about 17 MB at 720p. A 4 MB phone photo is usually 0.5–1 MB as JPG at quality 75 and smaller still as WebP. See the exact numbers in how it works.
Frequently asked questions
How do I reduce the size of a video?
Open Shrinkly, drop your video in, choose Medium quality (or a target size such as 10 MB) and press Compress video. Shrinkly re-encodes it to H.264 MP4 at an efficient bitrate, usually making it 50–90% smaller, then you download the result. Nothing is uploaded.
Is Shrinkly safe to use for private videos and photos?
Yes. Your files never leave your device. Compression runs inside your browser using WebCodecs and WebAssembly, so there is no server that could store, view or leak them.
What is the best free video compressor?
For quick, private compression without installing anything, an in-browser tool like Shrinkly is the fastest option. For advanced batch encoding with filters, desktop software like HandBrake or FFmpeg offers more control. See our comparison of the best free video compressors.
Does compressing a video reduce its quality?
Video compression is lossy, but at sensible settings the difference is hard to see. Lowering resolution (for example 4K to 1080p) saves the most space with the least visible loss on phones and laptops.
Is there a file size limit or watermark?
No watermark, no sign-up and no server-side size limit. Very large files are only limited by your device’s memory and speed.
Which formats are supported?
Video: MP4, MOV, WebM, MKV and M4V in, MP4 or WebM out. Images: JPG, PNG, WebP, AVIF, GIF and BMP in, JPG, PNG, WebP or AVIF out.