How to Resize Images for Email, Websites, and Sharing
“The file is too large” is often a dimension problem first. An image viewed only on screens rarely needs to carry every pixel from a modern camera.
Pixel dimensions and file size are different
Pixel dimensions describe width × height; file size describes stored bytes. Two 1920×1080 images can differ greatly because content, format, and quality differ. A heavily compressed 6000px photo can still be larger and less useful than a clear 1920px version.
Resizing should preserve aspect ratio. tinysqueeze longest-edge options scale proportionally rather than stretching a landscape photo into a portrait. They also avoid enlarging a source that is already smaller, which prevents pointless interpolation.
Starting points by destination
| Destination | Starting point | Extra note |
|---|---|---|
| Email/chat preview | Longest edge 1920px | Use 2560px when fine detail matters |
| Article content | 1×/2× around content width | Combine with srcset |
| Social sharing | Platform’s current recommendation | Rules change; verify before publishing |
| Print/editing | Keep original dimensions | Lightweight version is only a preview |
The order to use in tinysqueeze
- Select a longest edge for the destination, or use a proportional 1/2 or 1/3 reduction.
- Choose format: keep JPEG or use WebP for ordinary photos; retain PNG/WebP for alpha.
- Start at Balanced and process the most complex sample.
- Inspect in the destination screen or app, not only in a small tool preview.
- Once approved, process the batch and store originals separately.
When quality should change but dimensions should not
Pixels have real value when the recipient needs zooming, future crops, or high-resolution print. Keep dimensions and use mild lossy or lossless optimization. If a size limit still applies, ask which formats and quality levels are acceptable rather than silently shrinking the work.
Conversely, if an image will only appear in an 800px card, retaining 6000px is usually waste. Decide “how large must it be seen?” before “how many megabytes must it be?” for a more stable workflow.
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