Convert JPG to JPEG
JPG and JPEG are the same format wearing different name tags — this tool swaps the tag without ever touching your pixels.
Drop your image here
or
JPG, PNG, WebP, HEIC, SVG — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
If a system just told you it wants .jpeg instead of .jpg, you have met one of software's oldest cosmetic disputes: both spellings name the exact same format. The shorter one comes from the DOS era of three-letter extensions; the longer one is the standard's actual name, the Joint Photographic Experts Group. The files are identical — but a strict uploader that string-matches ".jpeg" will still bounce your photo over two missing letters.
The honest fix is a rename, and that is precisely what happens here: the tool verifies your file is real JPEG data, then returns the same bytes under the .jpeg name — instant, lossless, batch-friendly. No silent re-encode, no generation loss, unlike converters that re-compress your image to change two letters. And if the file turns out not to be JPEG inside (a renamed screenshot, say), it is properly converted to real JPEG instead of shipping a lie.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Choose quality or size
Pick a quality preset, set an exact KB target, or switch the output format — tuned for jpg to jpeg.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
Why would a website demand .jpeg specifically?
Strict or old upload validators match the exact extension string instead of inspecting the file. Both spellings have always meant the same format, but a string comparison doesn't know history — it just wants its four letters. The rename satisfies it losslessly.
Do my photos lose quality in this conversion?
No. Because JPG and JPEG are the same format, this tool returns your original bytes with only the extension changed — there is no re-encode, so quality loss is physically impossible here. Sites that re-compress for this rename cost you quality for nothing.
Can I just rename the file myself?
Usually, yes — and it would work. This tool adds two things a manual rename cannot: it verifies the bytes really are JPEG first (renamed PNGs and HEICs are surprisingly common and get properly converted instead), and it handles a whole batch at once.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.