Convert BMP, GIF, AVIF and ICO images

Features

• Formats the main converter skips

  Reads BMP, GIF, AVIF and ICO files as well as JPG, PNG and WebP, so one tool covers conversions such as BMP to JPG, GIF to PNG, AVIF to JPG or PNG to BMP.

• Four output formats

  JPG for photos, PNG for lossless graphics with transparency, WebP for the smallest files, and BMP for programs that only open uncompressed bitmaps.

• Quality control

  JPG and WebP have a quality slider from 50 to 100 percent. PNG and BMP are written without quality loss.

• Transparency handled

  PNG and WebP keep transparent areas. JPG and BMP cannot store them, so those areas become white and the page tells you when that applies.

• Batch conversion

  Convert up to 50 images in one run and download them individually or as a ZIP.

How to use BMP, GIF & AVIF Converter

1. 1Choose your images or drop them onto the page.
2. 2Select the output format and, for JPG or WebP, the quality.
3. 3Select Convert.
4. 4Download the converted images or the ZIP.

Supported formats

WebP output is not available in Safari. Reading AVIF needs a recent browser.

Limits and things to know

• Up to 50 images, 50 MB each and 300 MB in total. Images above 120 megapixels are refused.
• Animated GIFs become a still image of the first frame. The animation is not kept.
• Metadata such as camera details, location and colour profiles is not kept. ICO files with several sizes give one image, chosen by the browser.
• The browser does the decoding. A format it cannot read, such as AVIF in an old browser, gives an error for that file. TIFF and HEIC are not supported.
• BMP files are written uncompressed with 24-bit colour and are much larger than the same picture as PNG or JPG.

Privacy and processing

Decoding and encoding are done by your browser’s own image engine inside a Web Worker. Nothing is sent to FilesKit, which has no server that receives images.

Common uses

• Open old bitmaps

  Turn BMP files from old software or scanners into PNG or JPG that are a fraction of the size.

• Use a GIF as a picture

  Save the first frame of a GIF as a PNG or JPG for a document or a thumbnail.

• Share AVIF images

  Convert AVIF photos to JPG for programs and websites that do not accept AVIF yet.

• Feed a program that needs BMP

  Create BMP files for embedded devices, older tools and some game or hardware software.

How this differs from other approaches

Online converters upload every image and send the result back. FilesKit converts on your device, which is faster for big batches and keeps pictures private. Image editors such as GIMP offer more formats and let you pick individual GIF frames.

Frequently asked questions