Legacy images for a presentation deck: how to convert them

You add an image to a presentation, but the app refuses it, shows a blank preview, or makes the file look rough. This often happens with older formats such as BMP, TIFF, GIF, and ICO, especially when the slide app expects a more familiar image type.

Convert a copy to PNG or JPG before placing it in your deck. The Image Converter works in your browser and can convert up to 50 images at once, so you can prepare a group of files together.

Convert legacy images for your deck

1. Open the Image Converter and select the image files you want to prepare. It supports JPG, PNG, WEBP, GIF, BMP, ICO, and TIFF.
2. Choose an output format for the images. Use PNG for graphics that need transparency or crisp edges, and JPG for ordinary photographs.
3. Convert the files, then save the new copies in a folder for the presentation. Keep the originals until you have checked the results in your slide deck.
4. Insert a converted copy into a test slide. Check that it appears at the right size, has the expected background, and remains clear when displayed in presentation mode.
5. If you have many images, convert a few representative files first. Once you are happy with the format and appearance, process the rest in a batch.

Do not overwrite the original files as your first step. A separate converted copy gives you a fallback if an image loses transparency, color, or animation that you still need.

Choose the right output format

Use PNG for logos, screenshots, and transparent artwork

PNG is a good choice for diagrams, screenshots, logos, and graphics with sharp lines. It can preserve transparent areas, which lets the slide background show through instead of adding a solid rectangle. PNG files can be larger than JPG files, particularly for detailed photos.

Use JPG for photographs

JPG is widely supported and often produces smaller files for photos. It does not preserve transparency, and it uses lossy compression, which discards some image detail. Avoid repeatedly saving a JPG as another JPG, since each lossy conversion can reduce quality. If an image has text, thin lines, or a transparent background, PNG is usually the safer choice.

Check GIFs before converting

A GIF may be a still image or an animation. Converting an animation to a still PNG or JPG will not preserve its movement. If the motion is important to the slide, keep the animated file and check whether your presentation app supports it. If you only need one still frame, convert it and check that the chosen frame is the one you want.

Replace BMP and ICO files with a suitable image type

BMP files can be large, and ICO files are commonly used for icons rather than slide artwork. Convert a BMP photo to JPG to reduce its size, or to PNG if it has crisp edges or transparency. Convert an ICO to PNG when you need a regular image on a slide. Conversion does not create extra detail, so a small icon may still look pixelated when enlarged.

Keep TIFF when print quality or the source file matters

TIFF is often used for high-quality images and scans. If your presentation app accepts the original TIFF and it looks correct, there may be no reason to convert it. If it will not open, try PNG for detailed artwork or JPG for a photo, then inspect the output at the size you plan to show.

Fix common conversion problems

1. The slide app still will not open the image. Confirm that you inserted the converted copy, not the original. If the converted file also fails, convert one image to a different supported format and test that copy in a new slide.
2. The image has a solid background. This usually means the output format does not support transparency, or the original image did not contain a transparent background. Try PNG and check the result before replacing the image in the deck.
3. The image looks blurry on the slide. Check the source image dimensions. Enlarging a small icon or screenshot cannot restore details that are not in the original. Use a larger source image rather than repeatedly converting the same small file.
4. The converted photo looks different. Compare it with the original at the same size and on the same screen. JPG compression can soften fine detail, so use PNG if the small details are important and the larger file size is acceptable.
5. The deck becomes large or slow to share. Photos saved as PNG can take up more space than JPG versions. Convert photo files to JPG, while keeping PNG for transparent graphics, logos, and images where sharp edges matter.

When the converted image looks correct in a separate viewer but not in the presentation, the slide app may have a format or compatibility limitation. Try inserting the converted PNG or JPG into a new slide, and update or replace the app if it still cannot display common image formats.

Why keeping the original matters

Image conversion changes the file format, but it cannot repair a damaged source or restore missing image detail. Some formats also carry features that a simpler output cannot represent, such as animation in a GIF or transparency in an icon. Keep the original as an archive copy and use the converted version in the deck only after checking it.

The Image Converter runs in your browser, and the files you open stay on your device.