Compress PNG Online
Compress and resize PNG images locally in your browser. Free, private, and local-first.
Use Compress PNG Online
Compress images with browser canvas. Files stay on your device.
Original
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Output
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Dimensions
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Saved
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Choose an image to compress locally in your browser.
Quick answer
Compress PNG Online is a free online tool that helps you compress and resize PNG images locally in your browser. It runs in your browser, so you can work with development data, text, files, or generated output without creating an account.
About Compress PNG Online
Compress PNG Online helps you compress and resize PNG images locally in your browser. It is designed for focused local-first workflows where you need a quick result without creating an account or sending your input to a server.
Common uses include reducing oversized png screenshots before adding them to docs, optimizing transparent ui assets before web publishing, preparing smaller pngs for cms uploads and support tickets.
Use the examples, usage notes, FAQ, and related tools below when you need to compare formats, build sample data, validate inputs, or move into the next step of the same workflow.
What this tool does
How to use Compress PNG Online
- 1
Choose a PNG screenshot, transparent asset, or UI image from your device.
- 2
Lower the scale if you want a smaller PNG output.
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Click Compress image and compare the original and output file sizes.
- 4
Download the result, or try PNG to WebP if the PNG becomes larger.
Examples
Screenshot
screenshot.png - 2.4 MB at 2400x1600
Resized PNG
screenshot.png - 780 KB at 1920x1280
Transparent asset
logo-overlay.png with alpha channel preserved
If output is larger
Use a smaller scale or convert PNG to WebP
Use cases
- Reducing oversized PNG screenshots before adding them to docs
- Optimizing transparent UI assets before web publishing
- Preparing smaller PNGs for CMS uploads and support tickets
- Checking whether PNG or WebP is better for a specific image
- Shrinking image dimensions while keeping the PNG format
- Creating lighter product or app screenshots for landing pages
Related workflow
After using Compress PNG Online, many workflows continue with related tools for validation, conversion, cleanup, mock data, or final export.
Privacy and usage notes
CodeVella tools are designed to run locally in your browser. Your input is not uploaded to a server, and no account is required.
Generated test data is intended for development, QA, demos, and safe internal workflows.
Frequently asked questions
Is my data uploaded?+
No. This tool is designed to run locally in your browser.
Do I need an account?+
No signup is required for CodeVella tools.
Why can a compressed PNG become larger?+
PNG is lossless and browser re-encoding can sometimes create a larger file, especially for screenshots or already optimized images. Try a smaller scale or convert the PNG to WebP when file size matters more than PNG format.
Does the PNG compressor reduce quality?+
PNG export is lossless in the browser. This tool mainly reduces file size by resizing dimensions. For stronger compression, use PNG to WebP or reduce the image scale.
Will transparency be preserved?+
PNG transparency is preserved when exporting as PNG. If you convert to another format, check that the target format supports the transparency you need.