JPG to JPEG is a change of name, not of format. Both endings belong to the format of the Joint Photographic Experts Group, and a viewer reads photo.jpg and photo.jpeg identically. The short spelling is a leftover from eight-dot-three file names: MS-DOS and the first versions of Windows gave every file eight characters, a dot and three more, so the fourth letter was dropped.
Trouble starts when an upload field was written to accept “.jpeg” and nothing else. Older software and a few portals compare the letters after the dot with a fixed list, and a .jpg name fails that test before the picture is opened. This page reads your JPG, saves it again and gives the copy a .jpeg ending, the rest of the name unchanged.
Before and after
2400 × 1600 px349 KBJPG
2400 × 1600 px392 KBJPG
The picture and its 2400 × 1600 px size stay the same. Only the file changes: JPG at 349 KB in, JPG at 392 KB out.
JPG is an older format than JPG, so the same picture needs more space.
The numbers are from a real run of the tool above. The pictures here are smaller previews of the actual files.
How to use it
- Choose the .jpg file from your gallery or computer, or drop it onto the box.
- The quality slider sits at 92, which keeps the photo looking as it did; move it lower only when the form also wants fewer kilobytes.
- Press Convert and save the copy. It keeps your original name with .jpeg on the end, at the same pixel size.
- Upload that copy. If the field also sets a KB limit, read the size section below first, because the order matters.
Why a form still asks for .jpeg
An upload button carries a list of permitted endings typed by whoever built the form. When that list says “.jpeg” alone, the file picker greys out every .jpg or the server bounces the name. The check is a text comparison; the picture is never examined. Microsoft’s own table of common Windows file name extensions files jpg and jpeg under a single entry, a Joint Photographic Experts Group photo file.
The best known case in India is the PAN card. Protean’s guidelines for a new PAN application, run for the Income Tax Department, give the photograph as file type JPEG, 200 DPI, Max. 20 KB and 3.5X2.5 cms, and the signature as JPEG, 200 DPI, Max. 10 KB and 2X4.5 cms. The table never writes JPG, so a .jpeg copy at those sizes removes any doubt.
Re-saving here, or renaming by hand
This page does not merely rename. It decodes the pixels, encodes them again at the slider quality and writes a fresh file ending in .jpeg. Width and height stay as they were. Camera details such as date and GPS position are not carried over, and a photo that a phone stored on its side is written upright. Each JPEG encode loses a little, so keep the slider high and do not re-run the same copy.
A rename keeps every byte of the original, and Microsoft notes that changing an extension alters nothing about the file except its name. On Windows 11, open File Explorer and choose View, then Show, then File name extensions; on Windows 10 the same box sits under the View tab in the Show/hide group. Now click the name, replace .jpg with .jpeg and accept the warning. Without that box ticked, you add a second ending behind a hidden first one.
On a Mac, choose Finder, Settings, Advanced and tick Show all filename extensions, or select the file, press Command-I and edit the name under Name & Extension. Finder may warn that the creating app might not open it; for a photo, accept. On Android, in Files by Google, press and hold the file, or tap More beside it in list view, tap Rename, type the whole name ending in .jpeg and tap OK. If your file app keeps the ending locked, come back here.
A KB limit is a second job
Many people need .jpeg and a 20 KB, 50 KB or 100 KB ceiling at once. This page sets no size target; it only applies the quality you choose. Do the size first on a compress page, which writes a .jpg at or under the limit, and then change the ending. A rename is cleanest, because the compressor’s bytes stay untouched.
To convert instead, pull the slider down first and compare the size shown on the download button with the limit. Saving a tightly compressed JPG again at 92 commonly makes it heavier, and a 19 KB photo can come back at 24 KB, outside a 20 KB cap. Bulk, PDF and PNG are not on this page: it takes one picture at a time and writes JPEG only.
Frequently asked questions
- Is JPEG higher quality than JPG?
- No. The two endings describe one format, and the quality of a file comes from the number chosen when it was saved, not from how its name is spelt. A .jpeg is not sharper, smaller or newer than a .jpg.
- How do I make a JPEG for the PAN card form?
- Get under the stated weight first, 20 KB for the photograph and 10 KB for the signature in Protean’s table, then add the .jpeg ending by renaming, or by converting here with the slider lowered and the size checked.
- Can I convert JPG to JPEG on an iPhone?
- Yes. Open this page in Safari, pick the picture from Photos or Files and save the copy it produces. An iPhone photo stored as HEIC is read too and comes out as JPEG.
- Will the file be bigger or smaller afterwards?
- Often a little bigger. Phones save at a quality below 92, so a re-save at 92 spends more bytes on the same pixels. Lowering the slider brings the weight down; width and height never change.
- Does it handle many JPG files in bulk?
- No. One picture goes in and one .jpeg comes out. For a folder of files, renaming them in your file manager with extensions shown is quicker.
- My camera writes .JPG in capitals. Is that the problem?
- It can be. Some upload checks compare the ending exactly, so .JPG fails where .jpg would pass. The copy made here ends in lower-case .jpeg, which satisfies strict and relaxed checks alike.