JPG is the most common image format on the web. Resizing JPG files correctly keeps them sharp and prevents unnecessary quality loss — every unnecessary re-save of a JPG reduces quality slightly.
How to resize a JPG without losing quality
The key rules for lossless-looking JPG resizing:
- Only resize downward. Shrinking a JPG combines real pixel data and looks clean. Enlarging invents data that doesn't exist and produces a blurry result.
- Keep quality at 80–90%. Below 80%, compression artifacts become visible — blocky patches in smooth areas and ringing around edges.
- Work from the original. If you have the original unedited photo (from your camera or phone), start from that rather than a previously compressed copy.
- Don't re-save multiple times. Each save at less than 100% quality compounds the loss. Resize once, save once.
Common JPG resize use cases
| Use case | Recommended size | Quality |
|---|---|---|
| Email attachment | 1200 px wide | 80% |
| WordPress featured image | 1200 × 628 px | 82% |
| Instagram feed (portrait) | 1080 × 1350 px | 90% |
| Online form / ID upload | 600 × 600 px | 80% |
| Web thumbnail | 400–600 px wide | 75% |
Resize your JPG now
Supported formats: JPG, PNG, GIF, WebP, HEIC
JPG vs. other formats — when to switch
- JPG → PNG: When you need to edit the image further, or need a transparent background. Note that converting to PNG does not improve quality — it just stops further quality loss.
- JPG → WebP: For website images. WebP is 25–35% smaller at the same quality and is supported by all modern browsers. Use our JPG to WebP converter.
- Keep JPG: For photos sent by email, printed, or used in contexts where WebP is not supported.
FAQ: Resizing JPG images
Does resizing a JPG reduce its quality?
Resizing downward (making it smaller) does not cause noticeable quality loss if done correctly. The quality setting during the save step matters more — use 80–90%. Resizing upward always reduces sharpness because the tool must invent pixels that don't exist.
What is the best quality setting for JPG?
For most web use: 80–85%. For social media uploads: 85–90% (platforms re-compress, so start higher). For print: 90–95%. Below 75%, compression artifacts become visible to most viewers.
Can I resize a JPG without re-compressing it?
Technically, lossless JPEG resizing is possible with specialised tools (like jpegtran) for specific resize factors. For general web use, a high-quality setting (85%+) produces results indistinguishable from the original at typical viewing sizes.