Reduce attachment size
Reduce a single JPG/JPEG, PNG, or WEBP image to a smaller file size before attaching it anywhere.
Privacy note: your image is processed in your browser and is not uploaded to our backend.
Upload your image, set your target size in KB, and compress it instantly. Choose your file:
Your image will be compressed as close to your chosen size as possible while keeping the best quality achievable at that size.
What is an Attachment Size Reducer?
An attachment size reducer shrinks an image file so it fits within the upload or attachment limits of whatever platform you are using, whether that is an email client, a messaging app, a web form, or a file sharing service. Different platforms enforce very different size caps: email providers may limit individual attachments to a few megabytes, chat apps may compress or reject files above their threshold, and many web forms set hard limits in the low hundreds of kilobytes. This tool lets you type in whatever target size you need and automatically adjusts quality and resolution to reach it.
Why You Might Need to Reduce Attachment Size
Photos from modern phones and cameras are routinely several megabytes each, which often exceeds the attachment limits of the platform you want to use. Oversized attachments cause emails to bounce, form submissions to fail, and chat messages to be rejected or silently downgraded. Even when the platform accepts large files, they take longer to upload and download, waste storage space, and can slow down the recipient's device. Reducing the file size ahead of time ensures smooth delivery, saves bandwidth for both sender and recipient, and avoids the frustration of repeated upload failures.
Use Cases for Reducing Attachment Size
This tool is useful for shrinking image attachments before sending via email or messaging apps, preparing photos for web form uploads that enforce a size cap, reducing file sizes before uploading to shared drives or collaboration platforms with storage limits, compressing images for helpdesk or support ticket submissions, and fitting images within the limits of any system that rejects or degrades oversized files. Because the target size is adjustable, the same tool works for any attachment limit you encounter.
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