Compress PNG Online

Novaxera's PNG compressor optimizes a PNG file losslessly, free and with no signup. Every pixel and the transparency stay exactly as they were, so the image looks identical; savings are usually modest, and the page shows the exact reduction.

Select a PNG image

PNG · up to 50 MB · drag & drop or browse

Compressing...

This usually takes a few seconds.

Free · No signup · No watermark · Files deleted automatically within 60 minutes

Compress PNG at a glance

The key facts about Novaxera's Compress PNG tool.

Input
One PNG image
Output
PNG with identical pixels and dimensions
Method
Lossless optimization
Transparency
Kept
Price
Free — no signup, no watermark
Max file size
50 MB per file
File deletion
Upload deleted right after processing; result deleted within 60 minutes
Works on
Any modern browser — Windows, macOS, Linux, Android, iPhone

How to compress a PNG

  1. Upload a PNG

    Choose one .png file up to 50 MB.

  2. Optimize

    Novaxera optimizes the file losslessly and shows the exact reduction.

  3. Download

    Save the optimized PNG within 60 minutes, before it is deleted.

How Novaxera's Compress PNG works

Novaxera's PNG compressor optimizes the PNG file losslessly: the encoding is made more efficient, but no pixel is changed. Width, height, colors and transparency stay exactly the same, so the optimized image is visually identical to the original. Only the way the data is stored inside the file changes.

Because no image detail is discarded, PNG savings are usually modest and depend on how the file was saved originally. The page shows the exact result, such as “Reduced by X% (old → new size)”. The upload is deleted after processing, and the optimized PNG is deleted automatically within 60 minutes.

Why use Novaxera's Compress PNG

Pixel-identical result

Lossless optimization leaves every pixel unchanged.

Transparency kept

Logos and icons keep their transparent backgrounds.

Exact savings reported

You see the old and new file size before downloading.

Common use cases

Logos and icons

Trim a transparent logo or icon without changing how it looks.

Screenshots for documentation

Optimize screenshots for help pages while keeping text pixel-sharp.

Web graphics

Reduce PNG graphics before uploading them to a website or app.

Limitations to know

  • Savings are usually modest because the optimization is lossless; some PNGs shrink very little.
  • There is no resize or quality option, and one PNG is processed per upload.
  • For large reductions, convert with PNG to JPG (transparency becomes white) or PNG to WebP (transparency kept).

Tips for better results

  • Photos saved as PNG are often far smaller as JPG; convert them and then use Compress JPG.
  • Keep PNG for graphics with sharp edges, text or transparency.
  • For JPG, WebP and other formats, use the general image compressor.

Frequently asked questions

Does compressing a PNG reduce its quality?

No. Novaxera's PNG compressor optimizes PNG files losslessly, so every pixel, the dimensions and the transparency stay exactly the same. The optimized PNG looks identical to the original; only the way the data is stored becomes more efficient.

Why did my PNG barely get smaller?

Lossless optimization can only remove inefficiencies in how the PNG is stored, not image detail. If the file was already well optimized, Novaxera's PNG compressor may save little. For large reductions, convert the image to WebP, which keeps transparency, or to JPG, which fills transparent areas with white.

Does Compress PNG keep transparent backgrounds?

Yes. Novaxera's PNG compressor keeps transparency because the result is still a PNG and no pixels are changed. Transparent logos, icons and cut-out images keep their transparent areas after optimization, so they still sit cleanly on any background color.

Is it safe to compress PNG files on Novaxera?

Yes. Novaxera's PNG compressor receives files over an encrypted HTTPS connection, deletes the upload once optimization finishes, and deletes the optimized PNG automatically within 60 minutes. Your images are not shared or used for anything else.

Is Compress PNG free, and what are the limits?

Yes. Novaxera's PNG compressor is free, with no signup and no watermark. Each upload is one PNG file of up to 50 MB, and the width and height are never changed because there is no resize option.

Can I compress a PNG on my iPhone or Mac?

Yes. Novaxera's PNG compressor works in any modern browser on macOS, Windows, Linux, iPhone, iPad and Android. Upload the PNG, wait for optimization, and download the result. Nothing needs to be installed, and no account is required.

Related tools

Compress Image

Reduce JPG, PNG and WebP file size without changing dimensions

PNG to WebP

Convert PNG to smaller WebP files with transparency kept

PNG to JPG

Turn PNG images into JPG with a white background

Compress JPG

Shrink JPEG photos at quality 75, same dimensions

PNG to PDF

Turn PNG screenshots and graphics into one PDF

Last updated · Maintained by Ghaith Alali · Facts on this page describe how Novaxera's Compress PNG tool currently works. · Privacy policy