Smart resize
A fast, free online tool to resize images with aspect-ratio preservation, suitable for web publishing, product catalogs, and social media assets.
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About This Tool
The core logic distinguishes between required inputs (source image(s), target dimensions, output format, quality) and optional features (preserve aspect, resize mode, upscaling controls, padding color, and batch processing). It operates deterministically to support automation and CMS integrations.
In practice, users provide a source image, target dimensions, and a preferred mode (fit, fill, or crop). The tool computes final dimensions and either scales with padding, crops centrally, or fits within bounds while preserving the original aspect ratio. Outputs list resized files with metadata such as final width, height, format, and file size.
Typical use cases include creating uniform thumbnails for product galleries, social previews with exact widths, and hero images that must meet pixel constraints. The unique value lies in combining clear mode choices, quality controls, and batch processing in a single, predictable workflow, enabling scalable asset pipelines for web and app teams.
How to Use
- Upload one or more source images and set target_width_px and/or target_height_px (pixels).
- Choose resize_mode (fit, fill, crop) and enable preserve_aspect if needed.
- Select output_format and quality; decide whether to allow_upscale and set optional padding color if using fill mode.
- Run processing to generate resized outputs and metadata for each image.
- Download resized files or access batch results and verify dimensions and file sizes.
Frequently Asked Questions
Find Quick Answers
What input formats are supported?
Can I resize multiple images at once?
Does resizing preserve transparency and color profiles?
Is upscaling allowed?
Need to run multiple calculations?
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