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Convert PNG to ICO

Convert PNG to ICO in seconds. Free, no signup, no watermark, no file-size limit. Your file is processed in your browser and never uploaded.

At a glance

Source
PNG
Target
ICO
Where it runs
Your browser
Cost
Free, unlimited
Account
Not needed
PNG

Converter

PNG to ICO

On device

Drop one or more png image files.

or select png image

Your file never leaves this browser

    The details

    What happens when you convert between document formats

    Lossless images with transparency. The safe choice for graphics, screenshots and scans. The document is opened in a layout engine and re-saved in the target format, mapping each style onto the closest equivalent in the new format. The result is a the windows icon container. it holds several sizes of the same image in one file, produced entirely inside your browser.

    What survives

    • The text and the paragraph structure
    • Most formatting: fonts, sizes, colours, alignment, lists and tables
    • Embedded images

    What changes

    • Styles that have no equivalent are approximated
    • The file may gain or lose features the target format does not support

    Where it goes wrong

    • Styles are usually mapped by name, so renaming a style before converting can lose the mapping
    • The target format may not support the same page size or margins

    Why anyone would do this

    Different teams use different formats, and the content should not be held hostage by that.

    About the format

    Lossless images with transparency.

    Deflate compression applied to raw pixel data, chunk by chunk. Nothing is thrown away, so the pixels you put in are the pixels you get out.

    Where it is good
    • Lossless — no quality is lost, no matter how many times you convert
    • Supports full transparency
    • Handles flat graphics and text perfectly, with no compression artefacts
    Where it falls short
    • Large files: a phone-sized PNG can be 10–20 MB
    • No photographic compression, so photos look enormous
    • No support for animation beyond the separate APNG format
    You will find it on
    Designers, developers, scanners, documentation teams

    The thing people miss

    Converting a 4 MB JPG to PNG can make the file 20 MB or more, because the JPG had thrown away detail that PNG now has to store.

    About the target

    The Windows icon container.

    A header, a directory of image entries and the image data itself. Modern ICO files can embed PNG data for the larger sizes.

    • One file for every size Windows needs
    • Accepted by browsers for favicons
    • Can hold several different images at once

    Real jobs

    What people are actually doing with PNG

    Screenshots and UI assets that need crisp edges

    Logos and diagrams that need a transparent background

    Scanned documents where text edges must stay sharp

    Specification

    The details, in one table

    Source formatPNG — PNG image
    Target formatICO — Icon file
    Typical source size100 KB – 8 MB
    RunsIn your browser
    Account neededNo
    WatermarkNone
    File extension.png → .ico

    How to

    PNG to ICO, step by step

    1. 01

      Add your png image

      Drag the file onto the drop zone, or tap to browse. Only one file is needed.

    2. 02

      Choose the ICO settings

      Set the ICO-specific options — everything happens locally, so the speed is your device, not a queue.

    3. 03

      Download the result

      The finished ICO downloads to your device. Nothing is uploaded and nothing is retained.

    Also available

    PNG converts into

    PDFPDF documentJPGJPEG imageWEBPWebP imageSVGSVG vector

    Questions

    PNG conversion questions

    What actually happens to my PNG file when I convert it to ICO?

    The document is opened in a layout engine and re-saved in the target format, mapping each style onto the closest equivalent in the new format. So the PNG file is unpacked, the content is laid out, and the result is written out as ICO. The text and the paragraph structure survives unchanged.

    Will converting PNG to ICO reduce the quality?

    Partly. Styles that have no equivalent are approximated The text itself is never re-typed, so no words are lost.

    Is my PNG file uploaded to a server?

    No. This PNG to ICO conversion runs as JavaScript inside your browser tab. The file is read from your device and the result is written back to your device, so there is no upload step, no file-size limit and no copy of your PNG file on any server.

    Do I need an account or will there be a watermark?

    Neither. There is no sign-up step, no email capture and no watermark on the output. The only limits are the ones your own device imposes.

    What is the most common mistake people make when converting PNG to ICO?

    Styles are usually mapped by name, so renaming a style before converting can lose the mapping

    Why would somebody convert PNG to ICO at all?

    Different teams use different formats, and the content should not be held hostage by that. In short: screenshots and ui assets that need crisp edges

    Something most people do not know about PNG?

    Converting a 4 MB JPG to PNG can make the file 20 MB or more, because the JPG had thrown away detail that PNG now has to store.