filetity

JPEG -> JPG · Local tool

JPEG to JPG

Rename and re-save a JPEG as a .jpg file.

Last updated

  1. 01 / Your device

    the file stays here

  2. 02 / Browser memory

    the work runs locally

  3. 03 / Back to you

    saved on this device

When you would use this

Situations, not settings.

An upload that insists on the .jpg extension
Some forms check the file name rather than the file, and reject .jpeg for no real reason.
A folder with both spellings
Consistent names make sorting and scripting behave.
A tool that will not see the file
Older software sometimes filters on the extension alone.

How it works / no cloud

A conversion engine, not an upload form.

filetity decodes the JPEG with the browser's own codec and writes it back out with a .jpg extension. Because JPEG and JPG are the same format, this is a clean re-save rather than a conversion between two things.

  • Offline ready
  • Installable app
  • No file limit queue

Straight answers

No accordion. Nothing hidden.

Is it free?
Yes, with no watermark and no page limit.
Does it need an account?
No. There is no account system.
Is my file processed on my device?
Yes. The file is read by your browser and never uploaded. There is no server to send it to.
What formats are supported?
JPEG in. JPG out, one file per image, or a ZIP when you convert several.
What are the limits?
No image count limit. Very large images are bounded by the memory your browser will give a canvas.
Does it work on mobile?
Yes, on any modern mobile browser. Large files are limited by the memory the phone gives the browser.
Does it work offline?
Yes, after you have used it once. Your browser keeps what the tool needs, so it then works with no network connection.
What is the difference between JPEG and JPG?
Nothing. They are the same format. The three-letter spelling exists because old versions of Windows only allowed three-character file extensions, and it stuck. Any program that opens one opens the other.
Then why would I need this?
Because some upload forms and older software check the extension rather than the file, and reject .jpeg outright. This gives you a .jpg that those systems will accept.
Could I just rename the file myself?
Usually, yes, and if that works for you it is the faster answer. This page helps when you have a batch of them, when your phone will not let you edit an extension, or when the file also needs re-saving because something wrote it oddly.
Does this lose any quality?
A JPEG cannot be re-encoded completely losslessly, so there is a small generation loss at the default quality, the same as re-saving in any editor. If you only need the extension changed, renaming the file yourself avoids even that.
Does the re-save keep the camera data?
No. The file is decoded and written fresh, so the EXIF block, with the camera model, capture time and location, is not in the .jpg. If you need that kept, rename the file yourself instead. The orientation flag is applied to the pixels, so the picture is upright without it.

How this one works

Keep working locally

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