JPG to ICO

Upload a JPG 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 JPG 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 JPG file on the orange block above, or press “Choose JPG”.

  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 JPG to ICO conversion works

JPG is an image format: it uses lossy DCT compression that permanently discards fine pixel detail to achieve small file sizes, ideal for photographs. ICO is an image format 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. Converting between these two formats is common when the source application does not support ICO natively or when the target platform only accepts ICO. 1converter processes this conversion server-side using open-source tools. Files are transferred over HTTPS, converted on secure cloud servers, and returned through a private download link that expires after 24 hours on Free.

Sources and specifications

Quality levels for JPG → 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 ICO-ready icon sizes (e.g., 16–256 px) from one JPG source
  • Produces smaller, UI-focused files versus keeping a large JPG for icons
  • Turn a profile photo (JPG) into a Windows app or web favicon-style icon
  • Replace a blurry desktop shortcut icon by generating proper ICO sizes from a JPG

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 JPG to ICO.

Ask supportAll questions
Does converting JPG to ICO keep full photo quality?
ICO stores icon images at specific pixel sizes, so a JPG photo is resampled into those sizes; very fine detail may be limited at small dimensions like 16×16.
Why is an ICO file usually smaller than the original JPG?
ICO typically embeds only the required icon resolutions and uses image formats inside the container (often PNG-compressed), so it avoids carrying full photo dimensions.
Can ICO include transparency from a JPG source?
JPG itself has no transparency, but the conversion can create transparent icon entries (e.g., via masking) if the tool provides transparency options.
Will the resulting ICO work on Windows?
Yes—ICO is the native Windows icon format and supports multiple embedded sizes in one file, which helps it display correctly across different UI scales.

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

See plans