JPEG to ICO

Upload a JPEG file and download it as ICO. Free to start.

Drop files here, or press Enter to choose them. Up to 50 MB per file.
Drop a JPEG file hereFree · up to 50 MB · 10 operations in total without an account · or paste with Ctrl+V
  • Sent over HTTPS · link expires in 24 h

How it works

  1. Step 1:

    Drop the JPEG file on the orange block above, or press “Choose JPEG”.

  2. Step 2:

    Press “Convert to ICO”. The block shows the progress while the server converts the file.

  3. Step 3:

    Press “Download” to save the ICO file. On Free the link works for 24 hours.

How JPEG to ICO conversion works

The JPEG Image format uses lossy DCT compression that permanently discards fine pixel detail to achieve small file sizes, ideal for photographs. Converting to ICO produces an image file that bundles multiple raster images at different resolutions (16x16 through 256x256) into a single file for use as application icons. This conversion changes the file's encoding, compression method, and supported feature set. Colour profiles and orientation metadata are preserved in the output. This makes ICO the practical choice when the destination system requires it or when the target format offers better compatibility or compression. 1converter runs this conversion on the server: your file is uploaded encrypted over HTTPS, converted using trusted open-source libraries, and the output is held for 24 hours before automatic deletion.

Sources and specifications

Quality levels for JPEG → ICO

LevelFile sizeSpeed
Low qualitySmallest file, basic qualityVery smallVery fast
Medium qualityRecommendedBalanced size and qualityMediumFast
High qualityLarger file, great qualityLargeModerate
Maximum qualityLargest file, best possible qualityVery largeSlow

Image Tip: For photos, Medium quality offers the best balance. For graphics with text or sharp edges, use High or Maximum quality to preserve clarity.

When to convert

What the ICO file is good for and why people convert to it.

  • Creates an ICO container suitable for Windows icon usage from a JPEG source
  • Allows multiple icon sizes in one .ico file for consistent scaling
  • Generate a Windows desktop/app icon from a JPEG logo photo
  • Create a .ico for website favicons when you have artwork as a JPEG

Where your file goes

  • It travels to our server over an encrypted HTTPS connection and is converted there.
  • The ICO file comes back as a private link. It stops working after 24 hours on Free and 7 days on paid plans, and then the files are deleted.
  • Want the file to stay on your device? Private Mode converts images right in the browser. Open Private Mode

Questions and answers

What people ask before converting JPEG to ICO.

Ask supportAll questions
Will converting JPEG to ICO keep the same quality as the original JPEG?
JPEG is lossy, and ICO will not restore detail that was lost in the JPEG. The best result comes from using a high-resolution JPEG before conversion.
Does ICO support transparency like a PNG?
ICO can include an alpha channel, but transparency handling depends on how the converter packs the icon bitmaps. Some ICOs may fall back to a 1-bit mask if alpha isn’t used.
Why does an ICO file look blurry compared to the JPEG at small sizes?
Icons are raster images at fixed pixel dimensions; scaling down from a photo to 16×16 or 32×32 can introduce blur. Including multiple sizes (and a sharper source) improves small-size clarity.
Is JPEG-to-ICO conversion compatible with Windows and app icon requirements?
Yes—ICO is the standard container format for Windows icons and many desktop installer workflows. Ensure the ICO includes the sizes your target system expects (commonly 16/32/48 and optionally 256).

Many files at once? Starter converts 5 at a time, 100 a day.

See plans