Best Free Image Compressors Online in 2026 - Compared
Large images are one of the common reasons pages load slowly, and compressing them is one of the easier fixes. This page compares four free online compressors on what each one states about formats, batch size and where your files are processed. It is a feature comparison, not a benchmark: we have not run a controlled test of compression quality or speed, and vendor limits change. Third-party details were read from each tool's own site on 15 October 2026.
1. Why Compress Images?
- Faster page loads - images are often the largest part of a page's weight
- Core Web Vitals - smaller hero images can help Largest Contentful Paint (LCP)
- Lower bandwidth costs - less data transferred
- Mobile experience - lighter pages are easier on slower connections
2. Quick Comparison Table
| Tool | Formats | Batch and size limits (free) | Where files are processed |
|---|---|---|---|
| Snipinsta | JPG, PNG, WebP, HEIC | Up to 30 images; 50 MB per batch; no signup | Server (deleted within 24 hours per our privacy policy) |
| TinyPNG | PNG, JPEG, WebP, AVIF | 20 images per session; 5 MB per image | Server |
| Squoosh | Not listed on its home page | Not stated on its home page | Your device: "images never leave your device" |
| iLoveIMG | JPG, PNG, SVG, GIF | Limits not shown on the compress page | Not stated on the compress page |
"Server" means the file is uploaded to the vendor to be processed. Gaps are things the tool's page did not state when we read it; they are not claims that a limit does not exist.
3. The Tools
1. Snipinsta
Snipinsta's compressor takes JPG, PNG, WebP and HEIC, up to 30 images and 50 MB per batch, with presets (Max Quality, Web, Aggressive) and a quality slider from 30 to 95. No signup is needed. It sits alongside Snipinsta's other image tools (resize, convert, background removal, GIF tools), so you can do several jobs in one place. We have not benchmarked its output against the others.
Good fit if: you want compression next to other image tools, or need to compress HEIC from an iPhone.
Trade-off: files are uploaded to our server for processing (deleted within 24 hours per our privacy policy), so it is not the choice for photos that must never leave your device.
2. TinyPNG
TinyPNG's free web tool takes up to 20 images at a time, each up to 5 MB, and lists AVIF, WebP, PNG and JPEG. Its paid web plans (Pro and Ultra, billed yearly) raise the per-image limit to 75 MB and 150 MB. It also has an official WordPress plugin and a developer API (500 free compressions a month on the page we checked).
Good fit if: you want a single-purpose compressor with an official plugin or API.
Trade-off: the free tier's 5 MB per-image cap.
3. Squoosh
Squoosh is a Google project whose page says "Images never leave your device since Squoosh does all the work locally." That makes it the clearest choice here when privacy is the priority. Its home page does not list formats or batch limits, so check the app itself.
Good fit if: the files must not be uploaded anywhere.
4. iLoveIMG
iLoveIMG's compress page says it compresses JPG, PNG, SVG or GIF. It is part of a larger suite of image tools. Its compress page does not show size or batch limits or how long files are kept, so read its pricing and privacy pages before relying on it.
Other compressors exist (ShortPixel, Optimizilla, Kraken.io, Compressor.io and more). We have not compared their limits here, so this page makes no claims about them.
4. How to Choose the Right Tool
| If You Need... | Consider |
|---|---|
| Compress next to resize, convert or background removal | Snipinsta |
| HEIC (iPhone) photos | Snipinsta |
| Files that must not leave your device | Squoosh |
| An official WordPress plugin or API | TinyPNG |
| AVIF input or output | TinyPNG (lists AVIF) |
Frequently Asked Questions
Try Snipinsta Image Compressor
Compress up to 30 images at once - free, no signup.
Compress Images Free