ICO to FTS conversion is the process of transforming an ICO (Windows icon) file — which may contain multiple image sizes and color depths in a single container — into an FTS image format file. This conversion extracts the desired raster layer(s) from the ICO and re-encodes them into the FTS format, producing a single image file optimized for the target use case.
Related guides
Practical guides to help you choose formats, preserve quality, and avoid common conversion problems.
WebP has quietly become the default image format of the modern web, delivering 25-35% smaller files than JPG and PNG with universal browser support. This 2026 guide covers current adoption stats, browser compatibility, WordPress integration, conversion workflows, and when to choose WebP over AVIF for optimal Core Web Vitals performance.
Read guide →Not sure whether to save your image as PNG or JPG? This detailed comparison covers compression, transparency, file size, web performance, and real-world use cases so you can pick the right format every time — with conversion links when you need to switch.
Read guide →Learn how to convert HEIC to JPG for maximum compatibility. This guide explains what HEIC is, why iPhones use it, the key differences between HEIC and JPG, and walks through every conversion method including online tools, iPhone settings, Windows, and Mac.
Read guide →Drag your .ICO file from your computer or use the browse function.
Confirm .fts as the selected destination format.
Click "Convert" and download your converted .FTS file once ready.
The ICO format uses the MIME type image/vnd.microsoft.icon and typically contains multiple images representing various sizes and color depths. FTS files have the MIME type application/octet-stream and are often used in gaming or graphic rendering pipelines to store texture data. ICO files generally rely on BMP and PNG codecs, whereas FTS files may use proprietary compression depending on the software.
The FTS (.FTS) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like ICO.
While specific technical details aren't available here, FTS files generally serve the purpose of storing image effectively within their domain.
Easily convert your ICO files to the FTS format using our powerful online ICO to FTS converter. Whether you need to change file types for compatibility or specific project requirements, our converter simplifies the process without any software downloads.
ICO files are primarily used for storing icons in Windows environments, supporting multiple resolutions and color depths within a single file. FTS files, on the other hand, serve as a format optimized for specific applications requiring fast texture streaming or storage. While ICO is widely recognized for icon storage, FTS offers greater flexibility for performance-focused uses.
Keep individual ICO layers below 5 MB for fastest upload and conversion; strips out unused sizes to reduce output file weight.
To preserve transparency, select the ICO layer that includes 32-bit RGBA data and export FTS using lossless or high-quality settings.
For bulk workflows, convert in batches of 20–50 icons to avoid timeouts; use a desktop tool or queued server-side processing for very large batches.
Note that FTS is a less common specialized raster container — some viewers may not support all FTS compression options, so provide fallback PNG or BMP if broad compatibility is required.
This ICO to FTS converter saved me hours during my design workflow.
Emily R.
Graphic Designer
Reliable and fast conversion with no quality loss.
Mark L.
Software Developer
Perfect tool for our team's file format needs—easy and efficient.
Jessica P.
Project Manager
Start your free ICO to FTS conversion now.
Drag your file here to to upload.
Up to 250MB
Complex ICO files with multiple embedded bitmaps or unusual color palettes may require manual selection of the best source layer to avoid color shifts.