PNG ICO
Convert PNG to ICO directly in your browser. ICO is lossless, so every pixel is preserved exactly. Files are processed locally — nothing is uploaded to any server.
All conversion runs in your browser. Files never upload to any server.
How to convert PNG to ICO
-
Upload PNG
Drag and drop your PNG files (or a whole folder) into the dropzone. Multiple files are supported.
-
Pick quality
Lossless target — every pixel is preserved. Optionally resize, rename, or set a maximum dimension.
-
Download ICO
Save individual files or download the whole batch as a ZIP. Conversions run instantly with no waiting queue.
What changes when you convert PNG to ICO
Transparency
ICO preserves the full alpha channel — transparent areas remain transparent.
Metadata & color profile
EXIF, ICC color profiles, and ancillary chunks are stripped during conversion. Output files contain only image data — useful for privacy, but worth noting if you depend on color-profile fidelity.
Quality & compression
ICO is lossless — converting and converting back is bit-for-bit reversible (when both formats are lossless). File size depends on the encoder's entropy coding.
Quality & file-size benchmarks
Typical size change after converting a 1 MB PNG input into ICO with default settings. Real numbers depend on image content; these ranges cover ~80% of inputs.
| Input type | Photograph → ICO | Screenshot / line art → ICO |
|---|---|---|
| Photographic content | -90% … -20% | — |
| Screenshot, UI, line art | — | -90% … -20% |
Negative numbers = smaller output. Positive = larger. Measured on a representative 1 MB sample at the recommended quality setting.
PNG vs ICO
PNG and ICO optimize for different content. The table below summarizes how each handles transparency, compression, and browser support so you can pick the right target before converting.
| Feature | PNG (Input) | ICO (Output) |
|---|---|---|
| Best For | Graphics, Logos, Text | Browser Favicons |
| Compatibility | High (All browsers) | High (Web Browsers) |
| Transparency | Yes (Alpha channel) | Yes |
| Typical Size | Large (Lossless) | Small (Icon specific) |
| Compression | Lossless Compression | BMP or PNG based |
Rule of thumb: photographs → lossy (JPG); screenshots, logos, transparent assets → keep PNG or use WebP lossless.
Should you convert PNG to ICO?
Convert when…
- You need a format with broader compatibility for ICO.
- You want to preserve every pixel exactly.
- You are archiving or editing further.
Don't convert when…
- The current format is already optimal for your use case.
- You need lossy compression to reduce file size — this conversion will not shrink it.
Why this converter is different
Privacy by design
100% client-side. No server upload, no logging, no retention.
Unlimited & batch-ready
Drag and drop dozens of files. No file-count or size limits beyond browser RAM.
Works offline
After the first load, the converter keeps working without internet.
Privacy Guaranteed
We use WebAssembly technology. Your photos are processed in your browser, never uploaded to our servers.
Instant Speed
No upload time means faster results. The conversion happens instantly on your device.
Batch Conversion
Convert up to 50 files at once. Drag, drop, and convert your entire gallery in seconds.
Frequently asked questions
Is transparency preserved?
Yes. ICO supports a full alpha channel, so transparent regions of your PNG remain transparent in the output.
Is EXIF or color-profile metadata kept?
No. The conversion strips EXIF, ICC color profiles, and ancillary metadata. Output files contain only image data — better for privacy, but note this if you rely on embedded color profiles.
How many files can I convert in one batch?
Practical limit is roughly 50 files or 500 MB combined, since processing happens in browser RAM. For larger batches, convert in groups and use the ZIP download.
Is the converter free?
Yes — unlimited use, no signup, no watermark.