Compress Images for Email
Get under the 1 MB attachment limit — works with Gmail, Outlook, and Apple Mail.
Your images stay on your device. Nothing is uploaded.
Most mail servers reject attachments over 25 MB and many corporate filters trim that to 5–10 MB. The simple safeguard: get individual images under 1 MB. The defaults below produce JPEGs at q75 with a 1600-px cap to land comfortably under that bar.
Drop one image or use the bulk compressor for a whole folder. Compression is local and instant.
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Frequently asked questions
- How much can I shrink images for email attachments?
- Typical reductions are 60–85% with no visible quality loss using the defaults on this page. A typical 4-megapixel JPEG from a phone (~3 MB) reduces to 800 KB at q75 with a 1600 max-width — invisible quality loss at viewing size.
- What format is best for email attachments?
- JPEG is the safest choice for email — universally supported and rendered inline in every mail client. WebP support is now widespread but still inconsistent in older Outlook installs.
- Will compression break transparency or animation?
- Transparency is preserved when the output format supports it (PNG, WebP, AVIF). Animation is preserved for animated WebP. JPEG output flattens transparency to white.
- Can I compress dozens of images at once?
- Yes — use the bulk compressor. Drop a folder or multi-select files; the queue processes them in order with progress per file, and you can download all results as a ZIP.
- Do my images get uploaded anywhere?
- No. The tool runs entirely in your browser — important for client work, internal assets, and anything not yet published.
Optimise the rest of your email assets.
Use the bulk compressor to process a folder in one go. Everything runs locally.
Start compressing