PressImg — a free TinyPNG alternative with no upload

If you hit TinyPNG's 20-file limit or hesitated before dropping client photos onto someone's server, you're in the right place. PressImg does the same compression — entirely in your browser, with no file cap and no upload.

Your files never leave your device

TinyPNG uploads every image to its servers to compress them. That's fine for stock photos — but many designers work with unreleased product shots, confidential UI mockups, or client-supplied brand assets that shouldn't travel over the internet at all.

PressImg runs entirely in your browser using WebAssembly. When you drop a file, it's processed locally by the same codec that powers native image apps. No network request is made, no data is stored, and closing the tab erases everything. The result: identical compression quality, zero privacy exposure.

This isn't a marketing claim — you can confirm it yourself. Open your browser's Network tab, drop a file, and watch: no upload traffic appears.

Compress hundreds of files at once

TinyPNG's free tier caps you at 20 images per session. For a single product listing, a blog post with photos, or a UI kit export that's often fine. But when you're optimizing an e-commerce catalogue, a photography portfolio, or an entire design system — you'll hit that ceiling fast.

PressImg has no batch limit. Drop 200 files, compress them simultaneously, and download a ZIP. All processing happens in parallel in browser threads, so a batch of 50 images takes roughly the same wall-clock time as a batch of 5.

WebP and AVIF — formats TinyPNG doesn't support

JPEG and PNG are still the most common formats, but modern browsers universally support WebP (30–35% smaller than JPEG) and AVIF (50–80% smaller, better than WebP). If you're compressing images for the web today, outputting AVIF or WebP is simply the right call.

TinyPNG compresses JPG and PNG only. PressImg lets you compress all four formats and convert between them — drop a JPEG, get an AVIF back in one click.

When TinyPNG is still the better choice

TinyPNG offers a developer API and a WordPress plugin that auto-compress images on upload. If you need to compress images automatically as part of a build pipeline or CMS workflow, TinyPNG's API is purpose-built for that. PressImg is a browser tool — it doesn't have an API and doesn't connect to your CMS. If batch-manual compression is what you need, PressImg wins. If you need automated pipeline compression, TinyPNG's API is worth the subscription.