Compress ICO
Optimize ICO favicon files. Reduce icon file size for faster website loading.
ICO files are converted to a browser-friendly image format before compression so they are easier to preview and download.
Select ICO files
or drop files here
Maximum file size: 50MB per file
Convert to a modern format for better compression. WebP is recommended for best results.
Super Fast
Compress multiple files in seconds with our optimised algorithms.
100% Secure
All processing happens in your browser. Your files never leave your device.
High Quality
Maintain file quality while reducing file size up to 80%.
Compress, convert & crop images offline on iPhone - privacy-first, batch up to 200
Compress to Target Size
Quickly compress your files to specific file sizes
About ICO Compression
ICO (Icon) is the standard format for favicons and application icons. Our ICO compression tool optimizes these small but important files, ensuring fast loading times for your website favicons and app icons without sacrificing sharpness and clarity.Before emailing a PDF, open the downloaded copy and check fine text at the intended viewing size. The tool can reduce image detail; its target size is not guaranteed. If forms, signatures or searchable text matter, keep the original PDF.
What should I check before downloading?
Before emailing a PDF, open the downloaded copy and check fine text at the intended viewing size. The tool can reduce image detail; its target size is not guaranteed. If forms, signatures or searchable text matter, keep the original PDF.
- Compare the downloaded file’s quality and actual size.
- Savings vary by file. Some tools return the original if the output is larger; check the resulting format and size.
How to Compress :format Files
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1
Select ICO Files
Click the upload button or drag and drop your files into the upload area. You can select multiple files at once.
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2
Compress Files
Click the "Compress All Files" button. Our tool will process each file and show you the compression results in real-time.
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3
Download Compressed Files
Download your compressed files individually or all at once as a ZIP archive. Your original files remain unchanged.
Frequently Asked Questions
Is ICO compression lossless?
Our tool uses advanced compression techniques that can be either lossless or near-lossless. While we optimise file size, the visual quality is preserved to ensure your files look identical to the originals.
Are my files safe and private?
Absolutely! All compression happens locally in your browser. Your files are never uploaded to our servers or transmitted over the internet. This ensures complete privacy and security for your files.
What's the maximum file size?
Most tools accept files up to 50MB each. For larger files, try splitting them into smaller batches or using a different format.
How much can I reduce file size?
Compression results vary depending on the file content. Typically, you can expect 30-80% file size reduction. Files with large areas of solid colours compress better than complex files.
Why Choose Let Compress?
- Compare the downloaded file’s quality and actual size.
- Savings vary by file. Some tools return the original if the output is larger; check the resulting format and size.
Compress images
Adjust image quality or dimensions. Lossy output can change fine detail; preview text and edges before using it.
There is no guaranteed saving or exact target for every file. If the result is larger, some tools return the original; compare its format and size before sharing. Before emailing a PDF, open the downloaded copy and check fine text at the intended viewing size. The tool can reduce image detail; its target size is not guaranteed. If forms, signatures or searchable text matter, keep the original PDF.
References & Resources
Authoritative specifications and references for the file formats this tool works with.
Compress, convert, and edit images. Support PNG, JPG, WebP, AVIF, GIF and more formats.