When image resizing is the right fix
Use resizing when the image dimensions are larger than the target layout needs. This is the most direct fix for oversized product images, blog illustrations, screenshots, and social assets.
Resize Images
Resize your images to exact dimensions or common presets. Everything happens in your browser — your images never leave your device.
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Drag & drop your images here
or click to browse, or paste (Ctrl+V)
Supports HEIC, HEIF, WebP, PNG, JPG, AVIF, BMP
Best use cases for exact dimensions
Exact width and height are useful when a CMS, marketplace, or content editor expects a specific slot size. Presets help with quick downsizing, while custom dimensions help when your layout has strict requirements.
When resizing alone is not enough
If the image is still too large after resizing, combine resizing with format conversion or compression. The biggest gains often come from reducing both dimensions and transfer format overhead together.
Known limitations
Before converting, note these constraints:
- Output behavior follows format capabilities (for example transparency support and lossy/lossless rules).
- Final file size depends on source image content and selected quality settings.
- If compatibility is critical, choose broadly supported targets first (typically JPG).
How to Resize Images
1
Upload your images by dragging them into the box above, or click to browse.
2
Pick a size preset or enter custom dimensions.
3
Choose output format and quality, then download.
Frequently Asked Questions
What resize presets are available?
PicShift offers Max 1920px (long edge), Max 1080px, 50% scale, and a Custom mode where you can enter exact pixel dimensions or a percentage.
Does resizing reduce image quality?
Downscaling uses high-quality resampling. You can also adjust the quality slider to control compression. The combination of resize + compression gives you the best control over file size.
Can I resize and convert format at the same time?
Yes. You can change both the output format (JPG, PNG, WebP, AVIF) and the dimensions in a single step.
Why is the output file sometimes larger than the original?
The output file becomes larger for three clear reasons: (1) Converting from a lossy format (JPG, WebP) to a lossless format (PNG) preserves every pixel, so file size increases in exchange for zero quality loss. (2) AVIF uses the AV1 codec, which has encoding overhead for small or simple images. AVIF delivers its strongest compression gains on high-resolution photos, with 20–50% better compression than JPEG in benchmark comparisons. (3) If the source is already heavily compressed, re-encoding does not reduce size further. PicShift uses industry-leading WASM encoders (MozJPEG, OxiPNG, libwebp) to produce the smallest possible output at your chosen quality. In compress mode, PicShift automatically keeps the original file when compression increases size. Learn more: https://picshift.app/docs/size-increase-explainer