Batch Image Resizer
Resize, fit, rename, and export a batch of browser-decodable images as one ZIP.
Tool code processes selected files and entered content in your browser and does not submit them to a TOOLGRID processing endpoint. TOOLGRID measures tool usage, not the content you enter.
- No TOOLGRID input upload
- No account
- Review before copy
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What this tool does
Resize multiple images to a shared width and height, choose contain or cover behavior, set output format and quality, and download predictable renamed files in a ZIP archive.
Use one reproducible preset for a product gallery, documentation screenshots, or a social-image batch.
The preview reports original and output dimensions; cover mode crops around the center while contain mode adds a background when aspect ratios differ.
Where this tool earns its place
Contain each source on a white square and export numbered WebP files.
What to check before relying on the result
- Animated images are flattened to a single decoded frame.
- Very large batches can exceed browser memory; split the batch and retry failed files.
Open a nearby browser tool when you need to validate, convert, or reuse the result.
How to use
01Use Cases
Export every item image to the same box and naming pattern.
Constrain large screenshots before committing or publishing them.
FAQ
02What is the difference between contain and cover?
Contain keeps the whole image and may add background space. Cover fills the target box and crops overflow around the center.
What happens to transparency in JPEG?
JPEG has no alpha channel, so transparent areas are composited onto the selected background color.
Are filenames preserved?
The workspace generates a numbered prefix plus the original base name so ZIP entries remain unique and ordered.