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Compress Images for Email Attachments
Make photos and graphics easier to attach by reducing their file size before you open your email composer. Process JPG, PNG and WebP images locally, compare the result and download a lighter copy.
Drop your image here
Or choose an image from your device
JPG, PNG and WEBP supported
Photo dimensions & file-size quick reference
Dimensions are width × height in pixels. Suggested file sizes are compression targets, not platform limits.
| Destination | Dimensions / ratio | Export | File size / limit |
|---|---|---|---|
| Etsy listing photo | 2000 × 2000 px or larger on both sidesSquare or landscape; leave room for thumbnail crops | JPG / PNG | Aim for 1 MB or lessUpload guidance, not a hard maximum: Etsy warns that larger files may fail on slow connections. |
| Instagram feed photo | 1080 × 1080 or 1080 × 1350 px1:1 square / 4:5 portrait · practical export sizes | JPG | Suggested target: 1–2 MBResizeFox target, not an Instagram upload limit. Other supported ratios may also work. |
| Facebook feed photo | 1080 × 1080 px1:1 square · practical export size, not a required size | JPG / PNG | Suggested target: 1–2 MBResizeFox target, not a Facebook upload limit. Check the specific post or ad uploader. |
| Instagram / Facebook Story or TikTok artwork | 1080 × 1920 px9:16 vertical · suggested image canvas | JPG / PNG | Suggested target: 1–2 MBImage preparation only; video limits do not apply here. Confirm the limit in your chosen uploader. |
| Pinterest standard image ad | 1000 × 1500 px2:3 · Pinterest recommendation | JPG / PNG | Maximum: 20 MB desktop / 32 MB in appFor standard image ads created through Pinterest’s business tools. |
Need another shape? Crop first, then resize and compress. Keep your original; do not sacrifice detail just to reach a suggested target. JPG is usually suitable for photos. Etsy does not preserve PNG transparency.
Sources and scope · Etsy/Pinterest checked September 19, 2026
Etsy and Pinterest guidance was checked on this date. Instagram, Facebook and vertical-canvas entries are practical ResizeFox suggestions, not a complete list of accepted dimensions or verified maximum file sizes. Check the destination’s uploader for its current limit: posting apps, advertising tools and APIs may have different requirements.
Before you attach
How to Compress Photos Before Emailing
Choose the image
Select a JPG, PNG or WebP photo or graphic from your device.
Choose a target
Allow room for the message and any other attachments, then set a sensible maximum file size.
Review before sending
Inspect the preview, compare both sizes and download the compressed image to attach to your email.
Why Email Attachments Can Be Too Large
Modern phones and cameras create images with millions of pixels, often at settings intended for editing or printing. A single original may contain far more detail than someone needs to view it in an email. The total message also matters: text, signatures and every attachment contribute, and the recipient's system may enforce a different rule from the sender's provider.
File Size
Measured in KB or MB, file size determines how much data the attachment adds to the message. Compression changes the stored data and can reduce size without necessarily changing dimensions.
Image Dimensions
Width and height describe the pixel grid. A photo can have suitable file size but excessive dimensions, or useful dimensions but a heavy file. Use the image resizer when the pixels are the main problem.
Choosing a Sensible Target Size
Start from the email provider's current rule and the number of files you plan to attach. Leave a margin rather than aiming at the absolute maximum, because the complete encoded message can be larger than the files shown on disk. Choose the least aggressive target that solves the problem, then inspect faces, text and detailed edges in the preview. If one target looks rough, try a larger one or reduce the dimensions.
One Photo vs Several Photos
Sending one image
Give a single important photo enough room to preserve useful detail. A portfolio sample or product photo may deserve a larger target than a casual snapshot.
Sending a group
Add the compressed sizes together. Four files that each fit alone may still make the combined message too large. Compress individually or use a sharing link when the collection is substantial.
If the files are product photos intended for a marketplace listing, prepare the upload copy with the Etsy listing image workflow rather than relying only on an email-size target.
JPG, PNG or WebP for Email?
JPG for photos
JPG often gives photographs a practical balance of compatibility and size. Compression is lossy, so very small targets can reduce visible detail. For a JPG-only workflow, use the dedicated JPG compressor.
PNG for graphics
PNG preserves transparency and sharp graphic detail with lossless encoding. A photographic PNG may remain much larger because it cannot discard detail in the same way as lossy JPG.
WebP for efficiency
WebP can produce smaller photo or graphic files at useful visual quality. It is a good option when you know the recipient's software supports the format.
Need focused JPG output? Try the JPG compressor. For a general-purpose workflow, use the image compressor.
When Resizing Dimensions Helps
If a phone photo is several thousand pixels wide but will only be viewed inside an email, reducing width and height can remove data the recipient is unlikely to use. Resizing first may preserve better visual quality than forcing a full-resolution photo into an extremely small target. Keep the aspect ratio locked to avoid stretching the image.
Privacy by design
Private Browser-Based Processing
ResizeFox compresses the selected image locally using browser image and canvas capabilities. The photo does not need to be uploaded to ResizeFox servers. Only the downloaded result is available for you to attach in your own email service.
Useful Email Attachment Targets
These tools are convenient when you have already chosen a suitable maximum. They are not statements about any provider's current limit.
Troubleshooting
If the Image Still Will Not Send
- Check the combined size. Other attachments may be using the available allowance.
- Try a smaller target. Return to the original image, choose a lower maximum and inspect the new preview.
- Reduce dimensions. An oversized camera photo may need fewer pixels as well as stronger compression.
- Confirm the format. The recipient's system may accept JPG more reliably than a newer format.
- Use a sharing link. For many originals or files that must retain maximum detail, cloud sharing may be more appropriate.
FAQ
Email Image Compression Questions
What size should an image be for email?
There is no single size that suits every email provider, recipient or purpose. Check the sender's current attachment rules, count every file in the message and use the largest practical target that fits comfortably. If you are sending several photos, budget for their combined size rather than treating each image separately.
Does email compression change image quality?
It can. JPG and lossy WebP reduce size partly by removing visual information, while PNG uses lossless encoding but may remain larger. Strong targets can make photographs look soft or blocky, so inspect the preview and avoid compressing more than the message requires.
Should I send a JPG, PNG or WebP image?
JPG is often convenient for ordinary photographs and broad compatibility. PNG is useful for transparency, screenshots and sharp graphics, but photo-like PNG files can be large. WebP can be efficient, although you should confirm that the recipient's software or upload workflow accepts it.
Can I compress several email photos at once?
This tool processes one image at a time. When sending several photos, compress each one and then check their combined size in the email composer. For a very large collection, a cloud-sharing link may be more practical than many attachments.
Are my email photos uploaded to ResizeFox?
No. ResizeFox processes the selected image locally in your browser. The image does not need to be uploaded to ResizeFox servers for compression.