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Browser Image Compression

Compress images in the browser with zero server uploads. Reduce JPEG/PNG file sizes before uploading.

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MIT★ 1900

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What's next with Browser Image Compression?

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Use it free

Open the official tool or demo — no account needed.

Free

Self-host it

Run the open-source version on your own infrastructure.

Open

What is Browser Image Compression?

Browser Image Compression is an open-source JavaScript library distributed under the MIT license that performs lossy and lossless image optimization within client web browsers. Front-end engineers implement this library to reduce file sizes for user-submitted graphics, such as JPEG, PNG, and WebP images, prior to sending those files across network interfaces. The primary purpose of the library is to take an uncompressed File or Blob object, scale its dimensions based on maximum width or height thresholds, and iteratively adjust output quality to satisfy user-defined file size limits. For instance, a 12-megabyte camera upload measuring 4000 by 3000 pixels can be converted into a 450-kilobyte asset measuring 1920 by 1440 pixels entirely in client memory. First, the library provides automatic EXIF orientation handling, ensuring that photos taken on iOS or Android devices retain correct visual rotation during scaling operations. Second, it implements background processing via Web Workers, preventing main-thread rendering freezes while handling high-resolution camera assets. Third, it features an automated binary search loop that dynamically tunes quality settings until the target megabyte size is met. When compared to backend image processing servers like ImageMagick or Sharp pipelines, client-side compression eliminates server compute overhead and memory spikes. While server pipelines excel at bulk processing after ingestion, client-side execution prevents multi-megabyte uploads from consuming limited cellular data and slowing down form submissions.

How it works

Browser Image Compression is an open-source JavaScript library distributed under the MIT license that performs lossy and lossless image optimization within client web browsers. Front-end engineers implement this library to reduce file sizes for user-submitted graphics, such as JPEG, PNG, and WebP im

How to use it

  1. 1Use the Browser Image Compression tool.
  2. 2Use the Browser Image Compression tool.
  3. 3Use the Browser Image Compression tool.
  4. 4Use the Browser Image Compression tool.

What it can do

  • Compression
  • Image Processing

Use cases

Assumptions and limitations

Assumptions

  • source: https://github.com/Donaldcwl/browser-image-compression
  • license: MIT — free to use
  • privacy: Opens an external demo

Limitations

  • External demo — opens a third-party website that you do not control.
  • Relies on an external source (github.com); availability depends on that service.
  • Focused on the image tools category: Compress images in the browser with zero server uploads. Reduce JPEG/PNG file sizes before uploading..

Understanding the result

Compress images in the browser with zero server uploads. Reduce JPEG/PNG file sizes before uploading.

Tool details

  • Clearly flagged when a network request is needed.
  • No account, no sign-up, and no tracking of your content.
  • Powered by browser-image-compression (MIT).
Built with
browser-image-compression (Donaldcwl/browser-image-compression)
License
MIT
Runs locally
No — requires a network request
Verification
Not yet verified
Input
Image File
Output
Image, Compressed File
Open-source source & license

Built with Donaldcwl/browser-image-compression. OpenToolVault provides the discovery and browser interface while crediting the original project maintainers.

Built with
browser-image-compression
License
MIT
View source on GitHub

Open-source project

License: MITSource: this projectOfficial site

OpenToolVault is an independent directory. We are not affiliated with or endorsed by this project.

References

Frequently asked

What is Browser Image Compression?

Compress images in the browser with zero server uploads. Reduce JPEG/PNG file sizes before uploading.

Where can I find the source code?

Source: https://github.com/Donaldcwl/browser-image-compression

What license is this tool?

License: MIT

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