TinyPNG Alternatives for Batch Compression

TinyPNG is very good at its job. The panda has earned its reputation — the compression quality is genuinely excellent, particularly on PNGs, where its palette reduction routinely cuts 60–70% off a file with no visible difference. It’s been running since 2014, it’s never done anything shady with people’s images, and for most one-off compression tasks it’s the tool I’d point someone at.

You’re here because of a ceiling, not because it’s bad. There are three of them, and which one you hit determines which alternative you actually want.

The first is 20 images per upload on the free web tier. Fine for a blog post, painful for a product catalogue. The second is 5MB per image, which sounds generous until you’re working with photographs straight off a camera and half the batch gets rejected. The third is that your files get uploaded to their servers — they’re deleted within 48 hours and there’s no reason to think otherwise, but for client work under NDA or anything with a data-handling policy attached, “deleted within 48 hours” is a conversation you’d rather not have to have.

Let me go through what actually solves each of those.

The Options at a Glance

Tool	Batch limit (free)	Processing	Max file size	Formats out	Platform
TinyPNG	20 per upload	Server	5MB free	AVIF, JXL, WebP, JPEG, PNG	Web
BulkImagePro	No limit	Local (browser)	Your RAM	JPEG, PNG, WebP, AVIF	Web
Squoosh	1 at a time	Local (browser)	Your RAM	Wide codec range	Web
ImageOptim	No limit	Local (desktop)	Your disk	Same as input	Mac only
ShortPixel	100/month	Server	Generous	WebP, AVIF, JPEG, PNG	Web + plugins

One correction to something you’ll read in a lot of older comparisons, including one on this site that I need to go fix: TinyPNG does support AVIF now, both as input and output, along with JXL. That used to be a real differentiator against it and it isn’t any more. Worth saying plainly rather than letting a stale advantage sit in a table.

What TinyPNG Is Actually Better At

Before the alternatives, the honest accounting of what you’d give up.

The compression itself is the best-tuned of anything in this list on PNG files specifically. TinyPNG’s approach — reducing the colour palette intelligently rather than applying generic lossy compression — is unusually well suited to screenshots, logos, illustrations and anything with flat colour and sharp edges. On a test set of UI screenshots I’ve thrown at several tools, TinyPNG consistently lands 10–15% smaller than a generic quality-80 pass while looking identical.

It also requires zero decisions. There’s no quality slider, no format dropdown, no settings. Drag files, get smaller files. For someone who doesn’t want to think about compression at all, that’s a real feature, and every alternative below asks slightly more of you.

And the API is excellent. 500 images a month free, clean documentation, well-maintained client libraries. If you’re compressing programmatically rather than by hand, TinyPNG’s API is a better answer than anything else here and the rest of this article is beside the point.

BulkImagePro: When the Cap Is the Problem

Disclosure first, since this is our tool: I’ll try to be as direct about the limitations as the strengths.

BulkImagePro exists for the batch-size problem specifically. There’s no 20-image cap, no 5MB ceiling, and nothing gets uploaded — compression runs in your browser via JavaScript and WebAssembly, so the files never leave your machine. Drag in 200 product photos, set a quality level, get 200 compressed files back.

In practice, compressing 50 JPEGs at quality 80 takes about 15 seconds on a modern laptop. The relevant comparison isn’t speed against TinyPNG — TinyPNG is fast too — it’s that 200 images through TinyPNG’s free tier means ten separate upload rounds, and here it’s one.

The practical ceiling is your own hardware rather than a policy. Processing happens in browser memory, so a batch of several hundred high-resolution images on an older machine will slow down or run out of headroom where a server-based tool wouldn’t. For batches in the dozens-to-low-hundreds this never comes up. For thousands of files, a scripted pipeline is a better tool than any browser.

Where TinyPNG wins outright: PNG compression quality on flat-colour images, and the zero-decisions interface. BulkImagePro asks you to pick a quality number and trust it. For batch work that’s usually the right trade — you want the same treatment applied consistently across the set rather than per-image tuning — but it’s a genuine difference. It also handles bulk resizing and format conversion in the same pass, which matters if your images need more than compression, and our batch compression walkthrough covers that combined workflow.

Squoosh: The Wrong Tool for This, With One Exception

I’m including Squoosh because everyone suggests it, and mostly they shouldn’t for this particular problem.

Squoosh is a genuinely brilliant piece of software from Google’s Chrome team. The visual comparison slider — drag a divider across the image to see compressed against original, in real time, while adjusting quality — makes compression comprehensible in a way nothing else does. It runs locally, so the privacy concern disappears.

It also processes exactly one image at a time, with no queue and no multi-select. If your reason for leaving TinyPNG is a 20-image cap, moving to a tool with a 1-image cap is not progress.

The exception: use Squoosh to figure out what settings you want, then apply those settings in a batch tool. Load one representative image, experiment until you know that quality 78 is the point where artifacts appear on your kind of content, then run the whole set at 80 somewhere else. That’s a genuinely good workflow and it’s how I actually use it. Our Squoosh alternatives comparison goes deeper if that’s the tool you’re really trying to replace.

ImageOptim: The Mac Answer

If you’re on a Mac and the privacy angle is what’s driving you, ImageOptim is the shortest path.

It’s a desktop app. Drag images onto it — any number — and it strips metadata, runs several compression algorithms in parallel, and overwrites the originals with smaller versions. No upload, no account, no browser. Default mode is lossless, meaning output is pixel-identical to input, typically saving 20–35%. Enable lossy mode in preferences and savings jump to 50–70%.

Two limitations decide whether it fits. It’s Mac only — no Windows or Linux version exists. And it doesn’t convert formats, so you can’t take JPEGs and get WebP or AVIF out. If part of what you wanted from TinyPNG was modern format output, ImageOptim won’t cover it and you’d be running two tools.

The overwrite-in-place behaviour also deserves a mention: ImageOptim replaces your originals by default. That’s convenient and it’s also a foot-gun. Keep a copy of anything you can’t regenerate.

ShortPixel: If the Images Live in WordPress

ShortPixel solves a different shape of problem. Rather than “I have a folder of images right now,” it addresses “every image anyone uploads to this site should get compressed without anyone thinking about it.”

The WordPress plugin is well built. Configure it once and every media library upload gets compressed automatically, with three modes — lossy, glossy and lossless. Glossy is the one I’d pick for most sites: visually indistinguishable from the original while cutting 40–60%.

The free tier is 100 images a month, which is less than it sounds because WordPress generates multiple sizes per upload — thumbnail, medium, large, full — and each counts. Twenty photos can burn 80+ credits. Paid plans start low enough to be uncontroversial for a single site.

Same architectural caveat as TinyPNG, and slightly worse: images go to ShortPixel’s servers, and with the plugin running it happens automatically rather than as a deliberate act each time. If server uploads are the thing you’re trying to escape, this isn’t the exit.

So Which One?

You hit the 20-image cap. BulkImagePro — no batch limit, and it resizes and converts in the same pass if the images need that too.

You hit the 5MB limit. Same answer, for the same reason: local processing means the constraint is your machine rather than a free-tier policy.

You need files to stay on your machine. BulkImagePro if you want it in a browser and cross-platform, ImageOptim if you’re on a Mac and prefer an app. Both are genuinely local — nothing is uploaded.

You’re compressing programmatically. Stay with TinyPNG’s API. 500 images a month free, and nothing here beats it for scripted use.

You want the best possible PNG compression on screenshots and flat-colour graphics, in small batches. Also stay with TinyPNG. It’s better at that specific job than the alternatives, and if 20 images at a time is enough, there’s no reason to move.

Your images live in WordPress and you want this automated. ShortPixel, accepting the server round-trip.

My own split: TinyPNG for the occasional screenshot before it goes into documentation, because the quality on that content is excellent and I’m compressing one file. BulkImagePro for anything that arrives as a folder. The best image compressors comparison digs further into head-to-head quality if that’s your deciding factor, and the complete compression guide covers the underlying decisions about quality settings and format choice.

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Got more than 20 images, or files bigger than 5MB? Try BulkImagePro — drag in the whole folder, pick a quality level, and download the compressed batch. Everything runs in your browser, nothing is uploaded, and there’s no signup. Need the batch resized or converted to WebP too? The bulk resizer and format converter handle that in the same session.

Frequently Asked Questions

What is TinyPNG's limit on the free version?

The free web tier accepts up to 20 images per upload with a 5MB maximum per image, and permits converting up to 3 images to a different file type. The free API tier allows 500 images per month. Uploaded files are held on TinyPNG's servers and deleted within 48 hours. For larger batches or bigger files, a browser-based tool like BulkImagePro processes locally with no file count or size cap beyond your own machine's memory.

Is there a TinyPNG alternative that doesn't upload my images?

Yes. BulkImagePro compresses images entirely in your browser using JavaScript and WebAssembly, so files never reach a server. ImageOptim is a native Mac app that does the same thing on the desktop. Squoosh also processes locally but handles only one image at a time. TinyPNG and ShortPixel both require uploading files for server-side processing.

Does TinyPNG support AVIF?

Yes. TinyPNG now accepts AVIF, JXL, WebP, PNG, JPEG and HEIC as input, and outputs AVIF, JXL, WebP, JPEG and PNG. This changed from its earlier behaviour, so older comparisons stating that TinyPNG lacks AVIF support are out of date. Note that the free web tier limits format conversion to 3 images, separately from the 20-image compression allowance.

How do I compress more than 20 images at once?

Use a tool without a per-batch cap. BulkImagePro handles unlimited files in the browser, with the practical ceiling being your machine's available memory rather than a policy limit. ImageOptim has no batch limit on Mac. TinyPNG's API raises the effective limit to 500 images a month if you are comfortable scripting. Splitting a large batch into repeated 20-image uploads works but is slow and error-prone once you are past a few rounds.

Is TinyPNG's compression better than the alternatives?

On PNG files with flat colour — screenshots, logos, illustrations, UI graphics — TinyPNG's palette reduction is genuinely stronger than a generic quality-based pass, often by 10–15%. On photographic JPEG content the difference between TinyPNG, BulkImagePro, ImageOptim and Squoosh at comparable settings is small and generally invisible at normal viewing sizes. Batch capacity and whether files stay local are usually more decisive factors than output size.

Is TinyPNG safe to use for client work?

TinyPNG has operated since 2014 with no publicised breach, states that only you can access your uploads, and deletes files within 48 hours. For most work that is entirely reasonable. The question is contractual rather than technical: if you are under an NDA or working with an organisation whose data policy prohibits third-party uploads, sending client images to any external server may require a vendor review. A tool that processes locally sidesteps that conversation entirely.