BMP to JPG Converter

Online BMP to JPG conversion tool, supports batch conversion, adjustable quality and size, secure and reliable local processing

Bug report

Browser execution mode: Your data is processed in your browser and is not uploaded to the server.

Speed and Stability: Processing speed depends on your device and browser. For large batch work, the desktop version may be more stable.

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If the online tool fails to load or run, try the desktop tool.https://tools.yikeaigc.com/

Tool Usage

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Choose BMP images

You can select multiple BMP files at once. The first 20 are shown; all others will also be converted.

Click to choose BMP files, or drag them here Supports .bmp and image/bmp; processing is done on this device.

File preview Files queued

Set conversion parameters

Default settings are ready to convert. To reduce file size, lower quality or set a size limit.

JPG quality

Higher values are clearer but increase file size.

Size handling Scaling by limit keeps the aspect ratio.

Color mode Grayscale outputs black-and-white JPGs.

Max width (px) Scale down if wider.

Max height (px) Scale down if taller.

Set width (px) Setting width and height may change the aspect ratio.

Set height (px) For images that need a uniform size.

Scale (%) 100 keeps the original size.

JPG background color Fills transparent or blank areas.

File naming Output extension is always .jpg.

File name suffix Only applies when adding a suffix.

ZIP file name Used for batch downloads.

Allow image upscaling Auto-download when done

Process & download

Confirm files and settings, then start conversion. Multiple results will be compressed into a ZIP, with file names matching the originals by default.

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Result preview Show converted result

Instructions

Software Usage Instructions

Select BMP image files: Click the “Select BMP File” area and choose the BMP images you want to convert. You can also drag and drop files into the tool area. Batch selection of multiple BMP files is supported.
Use a sample BMP: If you want to try the conversion process first, click “Load Sample BMP” and the tool will generate a sample image for testing.
Set JPG quality: Adjust the JPG quality in the parameter settings. The higher the value, the more image detail is retained, and the larger the file size will be. For everyday use, choose a value between 80 and 95.
Set image size:
- Keep original size: Output the JPG using the original image width and height.
- Scale by maximum width and height: Set maximum width and height limits. Images exceeding the limits will be scaled down proportionally.
- Specify width and height: Output all images at the specified size.
- Scale proportionally: Enlarge or reduce the image by percentage.
Select color and background: You can choose RGB color or grayscale output. JPG does not support transparency; the background color will be used to fill transparent or blank areas.
Set file naming: By default, the original file name is kept and the extension is changed to .jpg. If duplicate file names occur, the tool will automatically add numbers to distinguish them.
Save settings: Click “Save Settings” to keep commonly used parameters such as quality, size, naming, and ZIP file name for future use.
Start conversion and download: After entering the “Process Download” step, click “Start Conversion”. Individual results can be downloaded separately, and multiple results can be packaged and downloaded by clicking “Download All Results (ZIP)”.

FAQ

A: BMP is a bitmap format that usually retains more original image information and has a larger file size; JPG saves images using compression, resulting in smaller files that are suitable for web display, email sending, and everyday sharing.

A: For general images, you can set it to 80-95. If you need to control file size, lower it to 70-85; if you need to retain more detail, increase the quality. The higher the quality, the larger the output file usually is.

A: By default, the original file name is kept and only the extension is changed to .jpg. If multiple files have the same name after conversion, the tool will add a number after the file name, such as image.jpg or image_2.jpg.

A: Choosing “Scale by maximum width and height” or “Scale proportionally” preserves the aspect ratio and is unlikely to distort the image. Choosing “Specify width and height” forces a fixed output size, which is suitable for scenarios that require uniform specifications.

A: No. Image reading, conversion, previewing, and packaging are all completed on the current device, and files are not submitted to the server.

A: The tool supports batch processing. When there are many files or individual images are large, it is recommended to convert them in batches to reduce memory usage and keep processing stable.

A: Common causes include the file not being in standard BMP format, a damaged image file, oversized image dimensions, or insufficient device memory. You can first try opening the original image to confirm the file is valid, then lower the size limit or process in batches.