Image Resizer

Resize and compress a single image to under 100 KB while preserving aspect ratio for web use.

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1,176+
Total Calculations Run
< 15ms
Browser Execution Speed
100%
Client-Side Privacy
4.9 / 5.0
User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Image Resizer processes input data instantly inside your browser.

Sample Input Birth date: Jan 15, 1995, Target date: Oct 20, 2023
Computed Result Chronological Age: 28 Years, 9 Months, 5 Days (10,505 days elapsed)
Execution Mode Client-Side In-Browser JS
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About This Tool

The image resizer takes a source image and optional constraints to produce a web-ready asset under 100 KB.
Conceptually, it separates dimension reduction from quality compression: it first scales within max width/height while preserving aspect ratio, then applies controlled compression or format conversion to reduce file size with minimal perceptual loss. The workflow is data-centric and deterministic: given a source image and constraints, the tool computes a candidate size and quality, performs resize and recompression, and reports the resulting dimensions and an estimate of the final size. Beneficiaries include developers delivering thumbnails, marketers generating email-friendly visuals, and content teams needing consistent assets. Unique differentiators include strict targets for file size combined with automatic aspect-ratio preservation, optional metadata stripping, and a straightforward payload suitable for automation. Core features include input validation; dimension-aware resizing; quality-based compression with adjustable quality; support for JPEG and PNG; output as a ready-to-use image payload; and a lightweight model for estimating final size. Use cases cover resizing product photos for catalogs, web banners, social images, and email-friendly visuals. The process is designed to be deterministic and reusable in automation. A typical run uploads an image, sets a max dimension or target size, optionally enables metadata stripping, and executes resize and compression; outputs include the new dimensions, final size estimate, and a downloadable image payload. The tool supports API-driven workflows with a single-image focus.

How to Use

  1. Provide inputs: Upload the source image and set max_width_px and/or max_height_px and target_size_kb.
  2. Choose method: enable aspect-ratio preservation and optional crop.
  3. Run calculation: the tool computes resized dimensions and starts compression to approach the target size.
  4. Review outputs: final_width_px, final_height_px, estimated_size_kb, and format.
  5. Export: download the resized image payload or data URI.
How to use image resizer less than 100 kb

Frequently Asked Questions

Find Quick Answers

What inputs are required?
You must provide a source image and at least one constraint: max width, max height, or a target file size (KB). By default aspect ratio is preserved unless you opt to crop. The output will indicate final dimensions and estimated size.
Can I guarantee under 100 KB?
The tool aims for a target size by adjusting dimensions and compression quality. Because image content affects compression efficiency, it cannot guarantee exactly under 100 KB in all cases; it provides the best effort and reports the achieved size.
Which formats are supported?
Output formats include JPEG and PNG. JPEG supports lossy compression with adjustable quality; PNG preserves transparency and is lossless. Metadata stripping is available as an option to reduce size further.
Is batch processing supported?
Currently the tool processes one image per run. Batch processing can be achieved by scripting multiple sequential runs via API or batch jobs, but there is no built-in multi-image queue in the core tool.

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