Significantly smaller files.
ICO is a lossless format that prioritizes fidelity over size. Converting to JPEG introduces modern compression that typically reduces file size by an order of magnitude with no perceptible difference at normal playback or viewing.
WHY CONVERT
01
ICO is a lossless format that prioritizes fidelity over size. Converting to JPEG introduces modern compression that typically reduces file size by an order of magnitude with no perceptible difference at normal playback or viewing.
02
JPEG is accepted by a wider range of image viewers, editors, and content systems than ICO. The conversion removes a recurring compatibility friction without changing what the file actually contains.
03
JPEG files are typically smaller than their ICO counterparts, which reduces hosting, transfer, and storage costs at scale. The savings compound when serving the same content to many recipients.
Visit this page on any modern browser — no install, no signup, no plugin.
Drag your ICO into the drop area, or click to pick one from your device.
Conversion runs entirely in your browser. When it's done, your JPEG file downloads to your device.
QUALITY & FIDELITY
FORMAT SPECS
| ICO | JPEG | |
|---|---|---|
| Extensions | .ico | .jpeg .jpg |
| MIME types | image/vnd.microsoft.icon image/x-icon | image/jpeg |
| Introduced | 1985 | 1992 |
| Maintainer | Microsoft | JPEG Group / ISO |
| Magic # | 00 00 01 00 | FF D8 FF |
| Spec | View spec ↗ | View spec ↗ |
COMPATIBILITY
| Platform | Windows | macOS | iOS | Android | Chrome | Firefox | Safari | Edge |
|---|---|---|---|---|---|---|---|---|
| ICO | Native | App | App | App | Native | Native | Native | Native |
| JPEG | Native | Native | Native | Native | Native | Native | Native | Native |
Why LocalConvert
| Category | LocalConvert | Cloud converters |
|---|---|---|
| PRIVACY | Files never leave your device. The whole pipeline runs in your browser via WebAssembly. | Files travel to a remote server, sit in queue storage, and may be retained for analytics or moderation. |
| COST | Free, no signup, no daily quotas. | Often free for small files; paid tiers for batch / large / commercial use. |
| LIMITS | Limited only by your device's memory and CPU. Multi-GB files OK on desktop. | Typical 100 MB to 1 GB per-file caps, plus rate limits. |
A container that can hold multiple sizes and bit depths of an icon image. Used for application icons and browser favicons.
Typical uses
Favicons, Windows app icons.
A lossy format for photographic images that strikes a strong balance between size and quality.
Typical uses
Photos, web images, email attachments.
Yes. LocalConvert is completely free, with no signup and no per-file or per-day limits.
No. ICO to JPEG conversion happens entirely inside your browser using WebAssembly — your file never leaves your device.
There's no fixed cap — the practical limit is your device's available memory. Very large files may take longer or fail on low-RAM devices.
Yes — once the page has loaded, ICO to JPEG conversion works without an internet connection. Re-open the page once to cache it.
LocalConvert uses the industry-standard tools (FFmpeg, ImageMagick, Pandoc) — quality matches what professionals use on the command line. Lossy formats will still lose some quality on each re-encode.
Last verified:
ICO to JPEG is processed in your browser with WebAssembly. No upload, no tracking, no limits. Your file never leaves your device.