Is there a TinyPNG alternative that does not upload my images?

Yes. This compressor runs entirely inside your browser, so the file never leaves your device. You can confirm it by loading the page, disconnecting from the internet, and compressing an image anyway.

Is this as good as TinyPNG?

For JPEG and WebP, yes, the results are on par for everyday web use. For PNG they compress a few percent tighter. In exchange you get privacy, unlimited batches, ZIP downloads and no account, which for most people is the better trade.

Is there a file limit?

No enforced limit on count or size. Very large files are slower because the work happens on your own device rather than on a server, so somewhere above 50 MB you will notice it.

Does it cost anything?

No. There is no paid tier, no account, no watermark and no daily quota.

What formats are supported?

JPEG, PNG and WebP. The output keeps the same format as the input. To switch a file between formats, use the image format converter .

A TinyPNG alternative that never uploads your images

The same job, done on your own device. Free, no account, no batch limit.

Images

Drop images here or click to browse

or paste from clipboard · JPEG, PNG, WebP

Files stay in your browser. Nothing is uploaded.

How it compares to TinyPNG

Feature	TinyPNG	Super Boring Tools
Where compression happens	Uploaded to their servers	On your own device
Files leave your device	Yes, every file is uploaded	Never
JPEG and WebP quality	Very good	On par for everyday use
PNG compression	A little more aggressive	Good, a few percent larger
Files per batch (free)	Capped at 20	Unlimited
File size cap (free)	5 MB per file	No enforced cap
Batch download as ZIP	No	Yes
Works offline	No	Yes, once the page has loaded
Account required	For anything beyond the basics	Never
Watermark or branding	No	No
Price	Free tier, then paid	Free, no tiers
Everything else you might need	Image compression only	A whole catalogue of tools

When to use TinyPNG instead

You need compression inside a build pipeline

We have no developer integration and no design-app plugin, by design. If you want compression to run automatically on deploy, that is the one thing they do that we do not.

You squeeze large PNGs for a living

On big flat-colour PNGs their compression runs a few percent tighter than ours. If that margin is worth uploading every file for, they earn it.

Frequently asked questions

Is there a TinyPNG alternative that does not upload my images?: Yes. This compressor runs entirely inside your browser, so the file never leaves your device. You can confirm it by loading the page, disconnecting from the internet, and compressing an image anyway.
Is this as good as TinyPNG?: For JPEG and WebP, yes, the results are on par for everyday web use. For PNG they compress a few percent tighter. In exchange you get privacy, unlimited batches, ZIP downloads and no account, which for most people is the better trade.
Is there a file limit?: No enforced limit on count or size. Very large files are slower because the work happens on your own device rather than on a server, so somewhere above 50 MB you will notice it.
Does it cost anything?: No. There is no paid tier, no account, no watermark and no daily quota.
What formats are supported?: JPEG, PNG and WebP. The output keeps the same format as the input. To switch a file between formats, use the image format converter.