Step 1: Supply your PNG files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted ICO files.
PNG to ICO Conversion FAQ
What does the PNG to ICO converter do?
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It takes a PNG image and re-encodes the pixel data as ICO. Colour and resolution are preserved; the difference is the container and compression scheme.
Will transparency in my PNG be preserved in the ICO?
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Yes. Both PNG and ICO support an alpha channel, so transparent and semi-transparent regions carry through unchanged.
Is the PNG to ICO conversion reversible?
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You can convert the ICO back to PNG on this site. If either format involved is lossy, the round-trip is not bit-perfect even though it is visually or audibly close.
What output quality should I expect from PNG to ICO?
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Default settings target broadcast / web quality — visually identical to the source for most viewers. For archival use, pick the highest quality option in the converter settings.
What sizes should the ICO contain?
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Include 16x16, 32x32, 48x48 and 256x256 and you have covered every context Windows and browsers ask for. A single ICO holds all of them, so the operating system picks the nearest match instead of resampling one size down and making it mushy. Start from a square PNG — anything else gets letterboxed or cropped. A single ICO holds several renderings of the same icon at different sizes — 16x16 through 256x256 — so the OS can pick the sharpest one.
Is anything lost converting between PNG and ICO?
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No pixel data, no. Both formats store the image without lossy compression, so the picture that comes out is identical to the one that went in and the conversion can be repeated indefinitely. What changes is file size, and which features travel — colour depth, embedded profiles, layers and animation are all supported unevenly between lossless formats. PNG uses DEFLATE compression over filtered scanlines, so every pixel survives exactly, plus a full 8-bit alpha channel.
Is there a file-size limit when converting PNG to ICO?
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Anonymous uploads are capped at a generous default; signed-in free accounts get a higher cap, and Pro accounts have no per-file limit. Browser memory is usually the practical constraint long before our server-side limits kick in.
Can I batch-convert several PNG files to ICO at once?
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Yes. Drop or pick multiple PNG files in one upload — the converter processes them in parallel and returns a ZIP of the ICO results. There is no need to repeat the upload step per file.
What happens to my PNG files after the conversion?
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Uploaded files and ICO outputs are auto-deleted after a short retention window. We do not inspect, share, or train on user files. Direct download links are time-limited and tied to your session.
Where can I open a ICO file?
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ICO opens in mainstream image viewers and editors. For web embedding, consider converting to PNG or WebP first since ICO is not always natively supported in browsers.
Do I need to install software to convert PNG to ICO?
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No. The converter runs entirely in your browser plus our cloud — no plugin, no install, no admin rights. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.
Do I need an account to convert PNG to ICO?
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No. PNG to ICO conversion is free and works without an account. Signing in unlocks higher file-size caps, batch history, and API access.
