Square composition
Use a centred 1:1 source to prevent distortion and clipping.
Photo & Image Tools Pro
ICO Generator
Create a valid multi-resolution ICO file for Windows shortcuts, desktop applications and legacy favicon workflows. The generator embeds six PNG icon sizes in one ICO container and keeps the selected source image inside your browser.
Create a real multi-size ICO file
The source is centre-cropped to a square and processed locally. Use a simple mark with generous padding so it remains clear at small sizes.
Image tool authority guide
How to use Ico Generator reliably
Follow this four-step process to create a usable output, verify the result and preserve the original file as a master copy.
- 1Select a supported image from your device.
- 2Choose the available output settings for the destination.
- 3Preview the result and inspect dimensions, quality and transparency.
- 4Download the new copy while keeping the original separately.
Practical image workflow
Prepare a clean square source before creating icon assets
Desktop and website icons work best from a simple square source with enough padding. Test the mark at small sizes before treating the generated output as production-ready.
Multiple sizes
Production icon packages often need several resolutions for different contexts.
Keep a master
Retain an SVG or large PNG source for future platform-specific exports.
Image engineering
Choose settings based on pixels, compression and colour
Image tools work with pixel dimensions, colour channels, metadata and format-specific compression. A smaller file can come from fewer pixels, stronger compression, reduced metadata or a more efficient format. These choices affect sharpness, transparency, colour consistency and future editability in different ways.
Pixel dimensions
Width and height determine on-screen detail and usually have the largest effect on file size.
Lossy vs lossless
Lossy formats discard visual information; lossless formats preserve exact decoded pixels but may remain larger.
Alpha transparency
PNG and WebP can store transparent pixels, while JPG replaces them with a solid background.
Colour and metadata
ICC profiles, EXIF orientation and camera metadata can affect appearance, rotation and privacy.
What the operation can change
- Resizing permanently changes the number of pixels in the exported copy.
- Lossy compression can create ringing, blocking or blurred fine detail.
- Format conversion may remove transparency or metadata.
- Repeated JPG saves can accumulate quality loss.
Domain-specific verification
- Compare the output at 100% zoom rather than only as a thumbnail.
- Inspect text edges, gradients, skin tones and transparent areas.
- Confirm width, height, file size and orientation.
- Test the final image in the website, marketplace or document where it will be used.
Engineering review
Prepare, verify and troubleshoot the image
Before processing
- ✓ Keep the original file as the master copy before editing or conversion.
- ✓ Confirm the source dimensions, colour mode, transparency and orientation.
- ✓ Remove confidential metadata when the image will be published or shared externally.
After downloading
- ✓ Inspect text, faces, logos, gradients and transparent edges at 100% zoom.
- ✓ Confirm the pixel dimensions and file size match the destination requirements.
- ✓ Open the downloaded file in the target browser, CMS, document or application.
ProblemPractical check
The result looks blurredAvoid enlarging a small raster source and reduce compression strength.
The file is still too largeReduce pixel dimensions before applying stronger compression.
Colours or transparency changedUse a format that supports the required alpha channel and test the result on its final background.
Implementation notes
- • Browser image processing is constrained by device memory, especially for high-resolution photographs.
- • Lossy formats discard image information; repeated exports can accumulate visible artefacts.
- • Visual quality should be judged at the final display size rather than only from the compression percentage.
Verify the output before using it
- ✓ Inspect the icon at small dimensions
- ✓ Check transparency and edge padding
- ✓ Confirm the output opens in the target platform
- ✓ Keep the original high-resolution source
Technical limitations
- • This browser workflow may produce PNG-compatible output rather than a full multi-resolution ICO container
- • Detailed artwork becomes unclear at small sizes
- • Platform packaging requirements can vary
Continue your image workflow
Use the result as part of an icon workflow, then validate the final package in the actual browser, shortcut or desktop application.