MiniPx vs TinyPNG: An Honest Comparison for 2026

By Gaurav Bhowmick·May 5, 2026·7 min read

TinyPNG has been around since 2014. It is a solid tool with a loyal following, especially for PNG compression. MiniPx takes a different approach — everything runs in your browser, with no uploads, no accounts, and no daily limits. Here is how they actually compare.

Privacy: client-side vs server-side

This is the biggest difference between the two tools. TinyPNG uploads your images to their servers, compresses them remotely, and sends the result back. Your files travel across the internet and sit on their infrastructure, even if only temporarily.

MiniPx does all processing inside your browser using the Canvas API. Your images never leave your device. You can verify this by turning off your internet connection — MiniPx keeps working. For anyone handling sensitive photos, client data, or identity documents, this matters.

Pricing and limits

TinyPNG gives you 20 free compressions per day on their website. Need more? You will need their API, which starts at $0.009 per image after 500 free monthly credits. Their WordPress plugin also requires an API key.

MiniPx is completely free. No daily cap, no API keys, no paid tiers. Since the processing happens on your own device, there are no server costs to subsidize.

Format support

TinyPNG handles JPEG, PNG, and WebP. Despite the name, it is not PNG-only anymore. But it does not support HEIC, BMP, TIFF, or format conversions between types.

MiniPx supports JPEG, PNG, WebP, and HEIC as input formats. It also converts between formats — you can drop a PNG and get a JPEG out, or convert JPG to WebP in one step. The HEIC to JPG converter is especially useful for iPhone users who need compatible files.

Compression quality

Let us be honest here. TinyPNG has excellent PNG optimization. Their server-side algorithms use color quantization that can reduce PNG file sizes dramatically while keeping visual quality high. For PNG-heavy workflows, TinyPNG is genuinely good.

For JPEG compression, the gap narrows. Both tools produce visually similar results at comparable file sizes. MiniPx gives you direct control over the quality slider, so you can find the exact balance you want. TinyPNG makes the quality decision for you automatically.

Target file sizes

MiniPx offers preset target sizes: 50KB, 100KB, and 200KB. This is useful when you need to meet a specific size requirement for a form, application, or email attachment.

TinyPNG does not offer target file sizes. It compresses each image by whatever amount its algorithm determines is optimal. You get what you get.

Developer and API usage

TinyPNG wins on developer tooling. Their API is well-documented, and they have official plugins for WordPress, Magento, Shopify, and more. If you need automated server-side compression in a build pipeline, TinyPNG has a mature ecosystem.

MiniPx is a browser tool. It does not have an API or CMS plugins. It is designed for manual, on-demand compression — the kind where you need to quickly shrink a few images before uploading them somewhere. Different tools for different jobs.

Side-by-side summary

Feature	MiniPx	TinyPNG
Privacy	Client-side (no upload)	Server-side (upload required)
Price	Free, unlimited	Free (20/day), paid API
Formats	JPEG, PNG, WebP, HEIC	JPEG, PNG, WebP
Format conversion	Yes	No
Target file sizes	Yes (50KB, 100KB, 200KB)	No
API / plugins	No	Yes (WordPress, Shopify, etc.)
PNG optimization	Good	Excellent
JPEG optimization	Good	Good
Mobile support	Full (browser-based)	Full (browser-based)

Which one should you pick?

Pick TinyPNG if you need an API for automated workflows, use their WordPress plugin, or work primarily with PNGs and want the absolute smallest file sizes.

Pick MiniPx if you care about privacy, need to compress more than 20 images in a day, want format conversions, or need to hit specific target file sizes. It is also the better choice for sensitive documents — exam photos, identity proofs, client images — since nothing leaves your browser.

Both are good tools. They just take different approaches. Use the one that matches your needs.

Frequently asked questions

Is MiniPx really free with no limits?

Yes. MiniPx has no daily file limit, no file size cap, and no account requirement. You can compress as many images as you want. The tool runs entirely in your browser, so there are no server costs to pass along.

Does TinyPNG upload my images to a server?

Yes. TinyPNG sends your images to their servers for processing. Their privacy policy states files are deleted after a period, but the upload itself means your images leave your device. MiniPx processes everything locally — your files never leave your browser.

Which tool produces smaller files?

For PNG files, TinyPNG often produces slightly smaller output because it uses advanced quantization techniques on the server. For JPEG and WebP, MiniPx produces comparable results using the browser Canvas API. The difference is usually 5-10% for most images.

Can I use TinyPNG for free commercially?

The free web version of TinyPNG allows 20 images per day for any use. Their API and WordPress plugin require a paid plan for higher volumes. MiniPx is free for all uses with no volume restrictions.

Does MiniPx support the same formats as TinyPNG?

MiniPx supports more formats. It handles JPEG, PNG, WebP, and HEIC input, plus format conversion between them. TinyPNG supports JPEG, PNG, and WebP. MiniPx also offers HEIC-to-JPG conversion, which TinyPNG does not.

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