Question 1

Are my images uploaded to a server?

Accepted Answer

No. Every step runs inside your browser using WebAssembly compiled from the same codecs used by native tools. Decoding, resizing and re-encoding all happen in a local Web Worker. There is no upload endpoint, and you can prove it: load the page, disconnect from the internet, then compress an image. It still works.

Question 2

Which formats are supported?

Accepted Answer

As input: JPEG, PNG, WebP, AVIF and JXL . As output you can produce JPEG, PNG, WebP, AVIF or JXL from any supported input. In automatic mode the tool re-encodes into the same format it read; switch on the custom selector to convert between formats in one pass.

Question 3

How does MotionPhoto work?

Accepted Answer

MotionPhoto is supported as an input format: a JPEG still with a video appended. Only the still image is compressed; the video inside is copied through unchanged, byte for byte, not re-encoded. The output stays a MotionPhoto; it is not flattened to a plain JPEG.

Question 4

How many images, and how large?

Accepted Answer

Up to 50 images at a time (20 on phones), each up to 20 MB . Larger batches work best when you send them in groups, since everything competes for the same CPU cores.

Question 5

Does compression reduce quality?

Accepted Answer

It depends on the format. JPEG, WebP and AVIF are lossy — they discard detail you are unlikely to notice, which is what buys the file size reduction. PNG output is lossless : it re-encodes the same pixels more cleverly, so the picture is bit-for-bit what you supplied. If a file is already well optimised, the result can even come out slightly larger — in that case just keep the original.

Question 6

Which format should I use?

Accepted Answer

Short version: JPEG for photos where reach matters most, WebP for a safe modern default, AVIF when you want the smallest file and can accept slower encoding, PNG for screenshots, diagrams, logos and anything with transparency or sharp text, and JXL when you want an archival-grade format and control the software that opens it. The format guide walks through the trade-offs properly.

Question 7

Can I compress many images in one go?

Accepted Answer

Yes — drop up to 30 files at once, and download them individually or as a single ZIP. This is the usual workflow for clearing down a folder of screenshots or preparing a product photo set for a site.

Question 8

Why is my compressed file bigger than the original?

Accepted Answer

Because it was already optimised, or because the content is unusually noisy. Lossy re-encoding has a floor. If the output is not smaller, use the original file — nothing is broken, and the tool never overwrites your source.

Question 9

Does it work offline?

Accepted Answer

Yes, once the page has loaded. All the compression codecs are downloaded to your browser on first visit and run locally from then on. This is also the simplest way to verify the privacy claim for yourself.

Question 10

Is it free? Is there an account?

Accepted Answer

It is free and there are no accounts, no sign-up and no usage caps beyond the per-batch limits. The site is supported by advertising; see the privacy policy for exactly what that involves.

Question 11

What data do you collect?

Accepted Answer

We record anonymous, aggregate statistics about compression — the source format, the target format and the input/output byte sizes — so we can tell which formats people actually use. This never includes your images, filenames or anything identifying, and it is only sent after you accept the cookie banner. Your images are never transmitted at all.

Question 12

What happens to EXIF and other metadata?

Accepted Answer

Re-encoding rebuilds the image from its pixels, so EXIF, GPS and camera metadata are not carried over to the compressed output. That is usually desirable for the web, but if you need to preserve EXIF, keep the original file.

Question 13

Can I use the compressed images commercially?

Accepted Answer

Yes. Your images remain entirely yours — the tool makes no claim over them, and since nothing is uploaded we could not use them even if we wanted to.

Question 14

Is there a Figma plugin?

Accepted Answer

Yes — tinyimg is also a Figma Community plugin , so you can compress selected layers without leaving your design file. It works the same way: everything runs locally, and the plugin requests no network access at all.

자주 묻는 질문

이미지가 서버로 업로드되나요?

어떤 포맷을 지원하나요?

MotionPhoto는 어떻게 처리되나요?

이미지는 몇 장까지, 얼마나 크게?

압축하면 화질이 떨어지나요?

어떤 포맷을 써야 하나요?

여러 이미지를 한 번에 압축할 수 있나요?

압축한 파일이 원본보다 큰 이유는 무엇인가요?

오프라인에서도 되나요?

무료인가요? 계정이 필요한가요?

어떤 데이터를 수집하나요?

EXIF 등 메타데이터는 어떻게 되나요?

압축한 이미지를 상업적으로 써도 되나요?

Figma 플러그인이 있나요?