A Free TinyPNG Alternative Without the File Limits

TinyPNG is the name everyone knows for image compression — the panda has squashed billions of images. It's a genuinely good service. But the free tier constrains you: images are uploaded to TinyPNG's servers, there's a per-image size cap, batches are limited, and heavier use is metered through its paid API. If you just want to make photos small enough for the web — repeatedly, in bulk, without thinking about quotas — a browser-side compressor removes every one of those constraints at once.

How the two approaches differ

TinyPNG's magic is lossy PNG quantizationon its servers: it reduces the color palette of a PNG cleverly enough that most people can't see the difference. The Toolerax Image Compressor takes a different, equally effective route for photos: it re-encodes the image on your device as JPG or WebP with a live quality slider, showing the before/after size as you drag. A 1.6 MB screenshot typically lands around 200–300 KB — an 80–90% saving — with the output visible before you download.

Side by side

When TinyPNG is still worth it

If you specifically need PNGs to stay PNGs(transparency plus tiny size — think logos with alpha channels used at scale) or a build-pipeline API, TinyPNG's quantization is excellent. For the everyday case — photos, screenshots and graphics going onto a website, a listing or an email — converting to WebP or a quality-80 JPG achieves the same practical goal, and you can process a hundred files without ever hitting a wall.

The full image workflow, one tab over

Compression is usually the last step. The rest of the pipeline is here too:

• Image Resizer — scale to the dimensions you actually display (the single biggest size win).
• Image Converter— PNG ↔ JPG ↔ WebP, with a white background auto-filled where transparency isn't supported.
• Image Compressor — final squeeze with the quality slider.

We walk the whole resize → convert → compress order in How to prepare images for your website.