ToolGPT

Compress a PNG by changing how it is stored

PNG keeps every pixel exactly, which is why screenshots and exported images get large. ToolGPT compresses a PNG by writing it as a JPEG or a WEBP, which leave out detail that is hard to see. You see the size of each option before anything runs, and the work happens in your browser.

  • Runs in your browser
  • No sign-in needed
Drop or choose your filesThe assistant opens with your files and does the rest.Choose Files
Things you can type
dashboard-screenshot.png
Open ToolGPTAttach a file and describe what you need.

More about the Image Compressor →

How it works

  1. 1

    Attach the PNG

    Add one image or a whole set with the + button, or drag them into the chat.

  2. 2

    Choose JPEG or WEBP and a level

    ToolGPT shows up to four options with a size on each. They are JPEG by default; say "as WEBP" to see them as WEBP.

  3. 3

    Download the result

    Tap an option. You get a new JPEG or WEBP for each image, and your PNG stays as it was.

Why a compressed PNG is no longer a PNG

PNG is a lossless format. It stores every pixel exactly, so there is no quality setting to lower. ToolGPT's compression therefore writes the image as JPEG or WEBP. Both are lossy formats that leave out fine detail the eye barely notices, and that is where the saving comes from. WEBP is usually smaller than JPEG at the same quality.

How much is saved depends on the image. A photograph stored as a PNG can shrink to a small part of its size. A screenshot or a flat diagram with large areas of one color may shrink very little, and sharp text can look softer as a JPEG. Each option shows the size it will not exceed, so you can judge before you tap.

Transparent backgrounds

JPEG has no transparency. When a PNG with a transparent background is compressed to JPEG, the transparent areas become white.

If the transparency must stay, keep the image as a PNG and make it smaller in pixels instead. Ask ToolGPT to resize it, for example to 1080 px on the long edge. A resize keeps the PNG format, and the size options show roughly what each one would weigh.

Frequently asked questions

Can I compress a PNG and keep it a PNG?

Not with compression, because PNG has no quality to lower. You can keep it a PNG by resizing it to fewer pixels.

Can I set a size limit for a PNG?

Yes, for one image at a time. ToolGPT writes it as JPEG or WEBP and tries lower and lower quality settings until it fits. If it cannot fit, it reports the smallest file it managed.

What is the new file called?

It keeps your file's name with "-compressed" added and the new format's extension, so it never replaces the PNG.

Are my images uploaded?

No. The images are compressed in your browser and stay on your device.

Try it with your own file

Open ToolGPT, attach a file, and type what you want done.

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