Free TinyPNG alternative that compresses images in your browser

What each option is

TinyPNG is an image-compression service. Its public site says it handles WebP, PNG and JPG, and now also lists AVIF and JPEG XL, with animated PNG in its FAQ. It uses smart lossy techniques, such as reducing the number of colours in a PNG, and strips unnecessary metadata. Around the web tool it offers a developer API for compression, resizing and conversion, plus plugins and integrations for WordPress, Figma, Make and Zapier, and a separate image CDN product.

Squoosh is an open-source image optimiser from the Google Chrome Labs team. Its site says images never leave your device because all the work is done locally. It exposes detailed controls for individual codecs and a side-by-side comparison slider.

Robince Studio's Image Compressor is a browser tool for JPG, PNG and WebP. Like Squoosh, it processes images locally; unlike TinyPNG's web tool, nothing is sent to a server. It is simpler than Squoosh: you drop images in, pick a quality, see the before and after sizes, and download, one at a time or in batch.

Comparison table

Details come from each product's own public pages and our own tool.

Why local compression is attractive

An image often contains more than people realise: faces, documents, screenshots with private information, or embedded location data. Compressing locally means those pixels do not travel anywhere. It also avoids upload time. A phone photo can be several megabytes, and sending ten of them over a mobile connection is slower than compressing them on the phone.

To confirm that a tool is local, open the browser's network tab, add an image and watch for outgoing requests carrying it. Going offline after the page loads is the quickest test: if compression still works, it is happening on your device.

You can verify local processing yourself in the network tab or by going offline after the page loads.

Getting good results: a practical guide

Compression is a trade between file size and visual quality, and the right setting depends on the image.

1. Resize first. A photo that is 4000 pixels wide displayed at 800 pixels on a web page wastes bytes. Use Image Resizer to reduce dimensions, then compress. This often saves more than quality settings do.
2. Pick the format for the content. Photographs suit JPG or WebP. Screenshots, logos and flat graphics suit PNG or WebP. Image Converter changes between PNG, JPG and WebP.
3. Start with a quality around the mid-to-high 70s to 80s for photos and look at the result at the size it will be displayed. Lower it until you can see an artefact, then step back up.
4. Check the before and after sizes. If the result is bigger than the original, which can happen when re-encoding an already-optimised file, keep the original.
5. Remove hidden data if you are sharing publicly: Remove EXIF Metadata strips camera and location details.

When Squoosh is the better choice

Squoosh deserves a straight recommendation in some cases. It supports modern codecs such as AVIF and JPEG XL and lets you tune encoder parameters, chroma subsampling, effort and colour palette for PNG. The interactive slider lets you compare original and result at pixel level, which is valuable when you are optimising a hero image where every kilobyte counts.

If you want AVIF output, or you need to choose the exact encoder settings, use Squoosh. Our compressor is intentionally simpler and does not currently produce AVIF. The advantage of simplicity is speed for bulk work: drop in twenty images, get twenty smaller ones.

When TinyPNG or another service is the better choice

A hosted service is the right pick when:

• You want to compress images automatically on upload to a website. TinyPNG offers a WordPress plugin and an API, which we do not.
• You work with design tools or automation and want integrations such as Figma, Zapier or Make.
• You prefer a tuned, automatic result with no settings at all, and you are comfortable with its upload and retention terms (read the current policy on its site).
• You want image delivery through a CDN, which is a separate product.
• You need AVIF or JPEG XL output in a one-click flow.

For plugin, API and automation needs, a hosted service wins; for a quick private batch, a local tool does.

Limits of our Image Compressor

It handles JPG, PNG and WebP; it is not a vector or animation tool. Animated GIFs are not preserved as animations in common browser re-encoding. Re-compressing an already heavily compressed JPG can degrade it further without saving much, so avoid chained compression. Output metadata is typically not carried over, which is good for privacy but not if you need to keep copyright fields; keep originals for archiving.

Free online services often cap the number or size of images per batch; check each provider's current terms. We apply no cap of our own, but a browser tab shares your device memory, so very large batches are best split.

Frequently asked questions

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