Batch Image Resizer
Resize PNG, JPEG, WebP, or AVIF images by width, percentage, or long edge and download a ZIP
Proportional resize, rounded to whole pixels. PNG ignores quality. JPEG fills transparency white; animation becomes one frame and original metadata is not retained.
Resized images will appear here.
About this tool
Resize up to 30 PNG, JPEG, WebP or AVIF images by width, percentage or longest edge. The aspect ratio is preserved, with final dimensions rounded to whole pixels and a minimum of one pixel. Width and long-edge inputs must be positive integers; percentage can be greater than zero through 1000%. Requests exceeding the output pixel limits are rejected instead of silently clamped. Select the source format or another supported format, inspect dimensions and bytes, and download individual files or a ZIP. PNG ignores the quality slider. JPEG fills transparent areas white; PNG, WebP and AVIF retain alpha. Decoding uses the browser when available; AVIF has a local WebAssembly fallback and encoder. Re-encoding keeps one frame, drops original EXIF and other metadata, and can change color profiles or high-bit-depth detail. Scaling uses browser interpolation rather than AI reconstruction; output pixels do not guarantee a particular print size. File or setting changes invalidate old results; duplicate download names are numbered. Each input must be at most 40 MiB, with no edge above 8192 pixels and no more than 32 million pixels. Files are processed in this tab and are not saved as browser drafts.
Scenario Recipes
Prepare a consistent image batch for a CMS
Goal: Normalize dimensions without mixing cropping and format conversion decisions
- Select representative source images and resize by the CMS long-edge limit.
- Choose the approved output format and quality, then compare every result's dimensions and bytes.
- Download the ZIP and spot-check sharpness, orientation, transparency, and color in the target CMS before replacing originals.
Result: A dimension-consistent batch with encoding choices reviewed separately from crop decisions.
Frequently Asked Questions
How are dimensions rounded?
The requested width or long edge sets a proportional scale. Both dimensions are rounded to integer pixels, with a minimum of one. Tiny images may differ slightly from the mathematical aspect ratio.
Why was a large resize rejected?
Input and output both have an 8192-pixel edge limit and a 32-million-pixel limit. Reduce the requested width or percentage; the tool does not silently cap it.
Does the quality slider affect PNG?
No. PNG encoding is lossless for the rendered pixels and ignores quality. Resampling may still change the original pixels.
What happens to transparency and metadata?
JPEG places transparent pixels on white. Re-encoding does not copy source EXIF, GPS or arbitrary metadata, and only one animation frame is kept.
Can multiple files have the same output name?
Yes. The displayed output names and ZIP entries receive numeric suffixes so no result is overwritten.
Are files uploaded?
No. Image processing and ZIP creation happen in the current browser tab. No image or filename is sent in result analytics.
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