MiniPx vs TinyPNG: An Honest Comparison for 2026

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 quotas. 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 batch on their website, each file up to 5MB, and you can run another batch straight after. Need bigger files or bigger queues? That is a Web Pro or Web Ultra subscription, or their API, which starts at $0.009 per image after 500 free monthly credits. Their WordPress plugin also requires an API key.

MiniPx is free with no daily cap, no API keys, and no credits to buy. Since the processing happens on your own device, there are no server costs to subsidize. The free tier does cap the queue at 5 files per batch; Pro removes that.

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

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 ifyou care about privacy, are working with files bigger than TinyPNG’s 5MB free ceiling, 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.