JFIF to JPG: Convert Your .jfif File for Free

How it works

1. 1Open the tool and select your .jfif file, or drag it into the box. The file picker lists .jfif files.
2. 2Check the preview and the image size that the tool shows before you convert.
3. 3Leave "Convert to" on JPEG, or choose PNG or WebP if you need another format.
4. 4Set a quality from 1 to 100 (the default is 80). If you want a smaller picture, set a size as well.
5. 5Click Convert to JPG, then download the .jpg file.

Example output

Original .jfif, 1200 x 900 px, 211 KB

Converted JPG, quality 80, 137 KB

How to convert JFIF to JPG

Start by opening the converter and choosing your file. The file picker lists .jfif files, so you can select the picture from your computer without renaming it first. JPEG is already selected in "Convert to", which is the right choice for a JFIF to JPG conversion.

Before you upload, the browser checks the file type, the file size and the pixel count. You then see a preview with the size, so you can confirm you chose the right picture. After conversion, the result panel shows the preview, the file size and the pixel size, with a Download button for the .jpg file.

• Choose the JPEG target to get a .jpg file.
• Check the preview before you start.

What JFIF to JPG conversion does

This JFIF converter decodes your picture and saves it again as a new JPEG file with the .jpg extension. The pixel width and height stay the same unless you set a smaller size. The work is ordinary image processing on our server, so the picture is sent to us and is not handled inside your browser.

The converter reads the file type from the file content, not from the name. A JPEG file starts with the same header bytes whatever its name, so a .jfif file is read as a JPEG. The output is a new file, and your original stays where it is on your device.

What a JFIF file is, in plain words

MDN, the Mozilla developer reference, explains that JPEG is really a data format for compressed photos rather than a file type, and that the JFIF (JPEG File Interchange Format) specification describes the format of the files people usually call JPEG images. A .jfif file is therefore a JPEG picture.

MDN lists .jfif among the file extensions of the JPEG image type. JPEG is a lossy format, which means some picture detail is removed when the file is saved. JPEG also has no alpha channel, so it cannot store transparency.

Rename or convert?

For most people, renaming a .jfif file to .jpg is enough. The picture data is the same JPEG data, so a renamed file usually opens and uploads without any loss. On a computer where you can see file extensions, you only need to change the ending.

Converting still helps in some cases. You may want to choose a quality, make the file smaller, make the picture smaller in pixels, fix a rotation, or remove camera tags from the copy. Converting is also the simple option if you cannot rename the file on your device.

JFIF, jiff and the .jfif file type

JFIF is often read as the word jiff, so some people search for a jiff to jpeg tool, or for how to convert jiff to jpg. They mean the same file: a picture with the .jfif ending. This converter handles it like any other .jfif file.

The ending is a naming difference, not a different picture. To change file type from JFIF to JPG you can rename the file or convert it, and the section on renaming above explains when each one is the better choice.

Why people convert JFIF to JPG

Some upload forms, apps and document editors check the file name and accept only .jpg or .jpeg. A .jfif file can be refused in that case even though the picture is a valid JPEG. Converting .jfif to JPG gives you a file with the name those systems expect.

Other people want a smaller file for email or a web page. Choosing a lower quality makes the JPG smaller, as the measurements below show. Some people also want the camera location tags removed before they share a photo, and the converter leaves those tags out of the result.

Choosing the JPG quality

The quality setting runs from 1 to 100, and the default is 80. A lower number gives a smaller file and more visible loss in the picture. A higher number keeps more detail but makes the file bigger.

Every save of a JPEG is lossy, so a JFIF saved as JPG loses a little detail each time. In our tests, a 1600 x 1200 test photograph saved as a JPEG at quality 90 (465 KB) came out at 121 KB at quality 60, 306 KB at quality 80, 465 KB at quality 90 and 935 KB at quality 100. Keep your original .jfif so you can convert again at a different quality if needed.

JFIF to JPG: file size

Converting a JFIF to a JPG can make the file smaller or bigger, depending on how the original was saved. In one test, a 1200 x 900 test photograph saved as a 211 KB JFIF file became a 137 KB JPG at quality 80, at the same pixel size. The same JFIF saved as a PNG came out at 2.5 MB, and as a WebP at quality 80 it came out at 70 KB.

These pictures were generated for testing, not taken with a camera. Real photographs, with their own detail and noise, can give different sizes. Check the file size shown in the result panel for your own picture.

Rotated photos, camera tags and colour

If a picture is stored rotated, the converter applies the EXIF orientation, so the JPG appears upright. In our test, a 1600 x 1200 file with orientation 6 came out as 1200 x 1600. Camera and location tags, such as EXIF and GPS data, are not copied into the result.

A progressive JPEG comes out as an ordinary baseline JPEG. A CMYK JPEG comes out as an RGB (sRGB) JPEG, and in our test a 1.3 MB CMYK file became a 314 KB RGB JPG at quality 80. A greyscale JPEG converts like any other. The picture is not resized or cropped by default, and the optional Size setting is the only way to make it smaller.

JFIF to JPG or JFIF to PNG

PNG is a lossless format, so it keeps every pixel exactly, but it has no quality setting. A photograph saved as PNG is usually much larger than a JPG. In our test, a 211 KB JFIF became a 2.5 MB PNG.

Choose the format by where the file is going. JPG suits photographs, and many upload forms and apps accept it. WebP can be smaller at a similar quality and works in many browsers, but some older programs do not open it. The tool can output PNG, JPEG or WebP, so you can compare the sizes for your own picture.

Which files the converter accepts

The converter accepts JFIF and JPG/JPEG files, along with PNG, WebP, AVIF, GIF and BMP. The file type is read from the content, so a file that is really a PNG is converted as a PNG, even if its name ends in .jfif. A text file or other unreadable file renamed .jfif is refused with an "unsupported image" message, and a corrupt JPEG is refused too. HEIC, HEIF, SVG, PDF and TIFF are not accepted.

The free web tool takes up to 5 MB per image and allows 30 images per day per visitor without an account. Signed-in users can upload up to 10 MB per image. Each image can be up to 16 MP (4096 x 4096) pixels, and a conversion costs 1 credits when you are signed in. If the result would be larger than 20 MB, the job fails with an "output too large" message.

JFIF to JPG from code

You can convert a JFIF file to JPG with the API. Send the raw bytes of the .jfif file as the request body, not as JSON or multipart form data. Use the query string op=image_convert and format=jpeg, and set quality from 1 to 100 if you want a value other than the default of 80.

The request needs an API key sent as a Bearer token, or in the x-api-key header. The API returns a job ID, and you poll the job until it succeeds or fails. Below the tool, the page shows a tested cURL, Node and Python example you can copy.

Privacy: what happens to your file

The uploaded image is used only to make the converted file. It is deleted as soon as the job ends. The converted file is kept for 10 minutes on the free web tool and then deleted, and no history of your conversions is kept.

Only upload pictures you have the right to use. Our Acceptable Use Policy applies to every file you send. Download links are short-lived, so save the file to your device after you convert it.

Questions