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· Last updated：2025-10-10
Convert PNG images to 8-bit color depth for smaller file size and better compatibility
Execution
Fill in the form, run the tool, and review the result in one place.
Samples
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Tool usage guide
Easily convert high-bit depth PNG images to 8-bit PNG format to significantly reduce file size while maintaining visual quality and improving cross-platform compatibility.
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Best for
Not ideal for
Very large files
Large files take longer and can hit browser memory limits — try a smaller sample first.
Skipping the output check
Compare the first rows or pages of the output with the input before using it in production.
Files from unusual exporters
Some files use format variants that do not convert cleanly — if the output looks wrong, re-save the file from the app that created it and try again.
Background
A developer has a collection of high-resolution PNG icons that are slowing down the website's initial load time.
Problem
The images are too large for optimal web performance.
How to use
Upload the icons, set the compression level to 9, and enable adaptive filtering.
quality: 85, compressionLevel: 9, adaptiveFiltering: trueOutcome
The icons are reduced in size by over 60% without noticeable loss in visual quality, improving site performance.
Background
A designer needs to submit assets to a legacy software platform that only accepts 8-bit PNG images.
Problem
The original source files are 32-bit PNGs and are rejected by the system.
How to use
Upload the 32-bit PNGs and convert them to 8-bit format using the default settings.
An 8-bit PNG uses a color palette of up to 256 colors, which significantly reduces the file size compared to 24-bit or 32-bit images.
Converting to 8-bit may result in minor color loss, but you can adjust the quality slider to find the best balance between file size and visual fidelity.
The compression level ranges from 0 to 9, where 9 provides the maximum file size reduction.
Enabling adaptive filtering helps the encoder choose the best compression strategy for each row of pixels, often resulting in smaller files.
Yes, you can upload PNG files up to 50MB for conversion.
quality: 90, compressionLevel: 9, adaptiveFiltering: trueOutcome
The images are successfully converted to 8-bit and are now fully compatible with the legacy software.