The free TinyPNG alternative that ships every feature you actually use
TinyPNG compresses beautifully. The friction is everything around it: 20 images per batch, 5 MB each, 3 free conversions, and your files leave your machine to get there.
Image Compressor vs TinyPNG, feature by feature
| Feature | Molixa | TinyPNG |
|---|---|---|
| Where images are processed | Your browser. Files are never uploaded | Uploaded to their servers |
| Images per batch | No cap | 20 |
| Max file size | Whatever your device handles | 5 MB |
| Free format conversions | No cap | 3 images |
| Encoders tried per image | JPEG, WebP and AVIF in parallel, smallest wins | One target format per run |
| Before/after inspection | Pixel-by-pixel diff slider | Preview |
| EXIF and GPS stripping | On by default | Not user-controlled |
| Batch download | Zip | Zip |
| Cost to lift the limits | There are none to lift | Web Pro or Web Ultra subscription |
| Signup | None | Required for subscription tiers |
4 reasons people switch to Molixa
Your images never leave the browser
Compression runs on your own machine through the Canvas and WebCodecs APIs. Nothing is uploaded, so there is no server copy to trust, retain, or leak. For client work under NDA, unreleased product shots, or anything with GPS in the EXIF, that difference is the whole decision.
No batch caps to work around
TinyPNG's free web tool takes 20 images of up to 5 MB per batch, and 3 free conversions. Compressing 200 screenshots means babysitting ten batches. Here you drop all 200 in at once and download one zip.
Three encoders compete, the smallest wins
Most compressors ask you to pick a format first. We encode each image as JPEG, WebP and AVIF in parallel and keep whichever comes out smallest at your quality target, so you get the best result without knowing in advance which codec suits that particular image.
See exactly what you gave up
A diff slider wipes between the original and the compressed version at full resolution. Compression is a judgement call about acceptable loss, and you should be able to see the loss before you ship it, not after a client points at it.
When to pick Molixa vs TinyPNG
TinyPNG earned its reputation. The compression is genuinely good, the API is well documented, and for a handful of images it is hard to beat the simplicity.
The limits are what send people looking. The free web tool takes 20 images per batch at 5 MB each, and free format conversion stops at 3 images. Lifting either means a Web Pro or Web Ultra subscription. If you compress images occasionally that is fine. If you are shipping a product, processing a photo set, or optimising a whole site's assets, you spend the afternoon in batches of twenty.
The other difference is architectural. TinyPNG works by uploading your files, compressing them server-side, and sending them back. The Molixa image compressor runs entirely in your browser, so the image data never crosses the network. That matters less for a stock photo and a great deal for an unreleased screenshot, a client's assets under NDA, or a holiday photo with GPS coordinates in the EXIF.
Where we go further: each image is encoded as JPEG, WebP and AVIF at once and the smallest result wins, rather than asking you to guess the right format up front. A diff slider lets you inspect the compressed version against the original at full resolution before you commit.
Where TinyPNG stays ahead: JXL support, the official API and client libraries, and the Photoshop plugin. If you need compression inside a build pipeline or inside Photoshop, that is still the better fit.
Where TinyPNG is still the better choice
Honest answer first. TinyPNG has real strengths. If any of these match your workflow, stick with them.
- TinyPNG's compression quality is excellent and has been tuned for over a decade.
- TinyPNG supports JXL, which we do not.
- TinyPNG has a documented API with official client libraries for most languages.
- TinyPNG has an official Photoshop plugin for compressing inside your design workflow.
- TinyPNG is a known, trusted brand with a long uptime record.
Try Image Compressor, it's actually free
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