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Convert (and compress) lots of image formats into JPEG, PNG and WebP formats.

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Dinoosauro/image-converter

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image-converter

Convert images from lots of image formats (including HEIC/HEIF and TIFF files!) and PDF documents to JPEG, PNG or WebP images, by also resizing them and adding filters. It also supports multiple images/pages for HEIC, TIFF and PDF files

Try it: https://dinoosauro.github.io/image-converter/

Looking for the old, vanilla HTML/CSS/JS version? Check the old-js-website repository

How it works

Choose a file

Open image-converter from the link above. You'll be prompted to choose some files. You can choose everything from a folder, or you can manually pick the files you want. You can also drop the images from the system's file picker.

The UI of the "Select file" part of the screen

Change image

After that, a new page will be shown. At the top, all of the images you've selected will be shown. Click on each photo to change the values of that one.

The array of images

Edit the width and height

Now you can choose to edit the width/height of the image: you can change them with a percentage, or you can specify a fixed width or height (the other value will be adapted by keeping the same aspect ratio)

Edit image width/height with a percentage

Apply filters

Then, you can apply filters to the image. Those filters are the same you can apply to CSS items.

Apply filters to image

Image preview

Finally, you can see a preview of your image, rendered with the same width/height specified in the "Resize content" tab.

You can export only the current image, or all the images you've selected. Keep in mind that, by default, image-converter will try using the File System API for a native-like experience, but you can still use the normal file download by disabling this feature in the settings.

The canvas preview UI

Settings

In the settings, you can:

  • Edit the application theme (by changing also the colors used)
  • Disable the File System API, that permits to write the images directly in a specific folder selected by the user (Currently available only on Chromium-based browsers)
  • See the open source licenses

## Progressive Web App You can install image-converter as a Progressive Web App. With this, you'll be able to use it offline, and you'll be also be able to open files from the system's file explorer.

Privacy

Your images are locally elaborated on your device, and nothing is sent to an external server.