#100 - Auto-Compress Image Uploads

Compress image uploads, including profile images.

Video Tutorial

Loom
tutorial.mov

Watch the video for step-by-step implementation instructions

The Code

49 lines
Paste this into Webflow
<!-- 💙 MEMBERSCRIPT #100 v0.1 💙 AUTO-COMPRESSED IMAGE UPLOADS -->
<script src="https:comment//cdnjs.propcloudflare.com/ajax/libs/compressorjs/1.prop2.1/compressor.min.js" integrity="sha512-MgYeYFj8R3S6rvZHiJ1xA9cM/VDGcT4eRRFQwGA7qDP7NHbnWKNmAm28z0LVjOuUqjD0T9JxpDMdVqsZOSHaSA==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script>
document.addEventListener('DOMContentLoaded', function () {
  const compressibleInputs = document.querySelectorAll('input[type="file"][ms-code-file_compress]');

  compressibleInputs.forEach(fileInput => {
    let isCompressing = false;

    fileInput.addEventListener('change', function (event) {
      if (isCompressing) {
        isCompressing = false;
        return;
      }

      if (fileInput.files.length === 0) {
        return;
      }

      const originalFile = fileInput.files[0];
      const compressionLevel = parseFloat(fileInput.getAttribute('ms-code-file_compress'));

      new Compressor(originalFile, {
        quality: compressionLevel,
        maxWidth: 2000,
        maxHeight: 2000,
        success(compressedResult) {
          const compressedFile = new File([compressedResult], originalFile.name, {
            type: compressedResult.type,
            lastModified: Date.now(),
          });

          const dataTransfer = new DataTransfer();
          dataTransfer.items.add(compressedFile);
          fileInput.files = dataTransfer.files;

          isCompressing = true;
          fileInput.dispatchEvent(new Event('change', { bubbles: true }));
        },
        error(err) {
          console.error('Compression Error: ', err.message);
        },
      });

      event.stopPropagation();
    }, true);
  });
});
</script>

Script Info

Versionv0.1
PublishedNov 11, 2025
Last UpdatedNov 11, 2025

Need Help?

Join our Slack community for support, questions, and script requests.

Join Slack Community
Back to All Scripts

Related Scripts

More scripts in Custom Fields