Free online TMP to JPEG converter

A graphics application may leave a recoverable image in a .tmp file that another program cannot open, upload, or edit. Converting a complete temporary image to .jpg makes it compatible with common photo editors, browsers, messaging applications, and JPEG-only systems.

What the TMP format is

.tmp is a generic temporary-file extension, not a standardized graphics format. Image editors, scanner utilities, screenshot tools, camera software, operating systems, and printer drivers may use it for previews, caches, autosaves, recovery data, working images, or interrupted exports.

A graphics-related TMP file may contain a complete JPEG, PNG, BMP, or TIFF image, but it may also contain proprietary working data, raw pixels, an incomplete file, or no independently viewable image. The extension does not identify the pixel format, dimensions, color depth, or whether the file is complete. Temporary files may also be deleted automatically when the creating application closes.

Copy the file before testing it. Renaming image.tmp to image.jpg changes only the filename; it converts nothing. Renaming works only when the file already contains valid JPEG data and the receiving application uses the filename to recognize it.

What the JPEG format is

JPEG, commonly stored with .jpg or .jpeg, is a raster-image format designed mainly for photographs and continuous-tone graphics. Its lossy compression produces relatively small files with broad support in browsers, operating systems, cameras, document software, and messaging applications.

Typical JPEG exports use 8-bit-per-channel RGB or grayscale data. JPEG does not preserve transparency or editable layers, and it is unsuitable for animation. PNG is usually a better target for screenshots, diagrams, text-heavy graphics, line art, or images that need transparent areas.

How to convert a TMP file to JPEG

First use the application that created the file, if it is known. Open a copy through File → Open, then use File → Export or File → Save As and select JPEG. The original application may have the complete image, color profile, layers, or recovery information that is missing from the temporary file.

If the source application is unavailable, try a graphics application such as GIMP, IrfanView on Windows, or XnView MP on Windows, macOS, and Linux:

1. Make a copy of the TMP file and keep the original unchanged.
2. Open the copy with File → Open. If the file chooser filters it out because of the extension, select an all-files option. Do not permanently rename the original.
3. If the program displays a complete image, choose File → Export As or File → Save As, enter a filename ending in .jpg, and select the JPEG format.
4. Choose a quality near 85–95 for photographs. If the source has transparency, flatten it against an intentional background color before exporting.
5. Open the resulting JPEG and verify its dimensions, orientation, colors, and visible content before deleting the TMP file.

GIMP is useful when the recovered image needs cropping, color correction, or other editing. Export through File → Export As; do not overwrite the temporary source.

Use ImageMagick for inspection and batch conversion

ImageMagick can inspect a file's internal signature rather than relying only on its extension:

magick identify image.tmp

If it reports a recognized image format and dimensions, export a JPEG with:

magick image.tmp -quality 90 image.jpg

If the data is known to be PNG but the filename prevents detection, specify the input format explicitly:

magick png:image.tmp -quality 90 image.jpg

An explicit format declaration does not repair a truncated or corrupt file. Batch conversion is safe only after confirming that the TMP files contain the same image format and are complete.

Some TMP files contain raw pixel data rather than a self-describing image. Conversion then requires the exact width, height, channel order, and bit depth. For example, this command is valid only for known 1920 × 1080, 8-bit RGBA data in the stated byte layout:

magick -size 1920x1080 -depth 8 rgba:image.tmp image.jpg

Wrong raw-image parameters produce incorrect dimensions, colors, or alignment, so this method cannot infer missing information.

Convert without installing software

You can use the free converter on 101convert.com without installing software, provided the service accepts the file and recognizes a complete image inside it. Uploading a TMP file exposes its contents and possibly its metadata to the service; use local software for private photos, scans, confidential work files, and recovery data.

Quality and compatibility limits

A cache fragment, interrupted write, proprietary working file, or file containing only raw application data may not be convertible. If an image application shows corruption or refuses the file, recover it through the original program or restore it from the camera, scanner, backup, or other source.

JPEG compression discards image information. Export once from the highest-quality available source instead of repeatedly opening and saving the JPEG. A quality setting near 90 is a practical compromise for photographs, but it cannot restore detail already missing from the TMP file. Recompression artifacts are most visible around text, sharp edges, and flat-color graphics.