Image Compressor

Reduce image file size while preserving visual quality. Supports JPEG, PNG, and WebP. All processing happens in your browser — files are never uploaded.

Click or Drag & Drop Image Here

Supports JPEG, PNG, and WebP up to 20MB

Processed entirely in your browser. 100% private.

Key Takeaways & Quick Facts

Primary Purpose

Compress images without losing visible quality — right in your browser.

Execution Environment

100% Client-Side In-Browser (Zero Cloud Uploads)

Standard Verification

Calculations tested against standard benchmarks

How to Use Image Compressor

Click or drag-and-drop an image (JPEG, PNG, or WebP) into the upload area.
Use the Quality slider to adjust the compression level (for JPEG and WebP).
Select a specific output format if you want to convert the image (e.g., PNG to WebP).
Optionally, specify a maximum dimension to resize large images proportionally.
Click "Compress Image" and review the file size savings.
Click the download button to save your optimized image.

How it Works

The Image Compressor uses your browser's native Canvas API to decode, scale, and re-encode the image. For lossy formats like JPEG and WebP, adjusting the quality slider changes how aggressively the encoder discards visual data to save space. PNG uses lossless compression, so the quality slider has no effect, but resizing a PNG can significantly reduce its size.

Frequently Asked Questions

Are my images uploaded to your server?

No. Absolute privacy is guaranteed. All image processing happens entirely within your web browser. We never upload, store, or see your images.

Why did the file size increase instead of decrease?

This can happen if you try to compress an already highly optimized image, or if you convert a simple format (like a tiny PNG icon) into a complex format. The browser encoder may add metadata or use a less efficient compression algorithm than the original file.

What happens if I convert a transparent PNG to JPEG?

The JPEG format does not support transparency. Any transparent areas in your PNG will be filled with a solid color (typically white or black) in the resulting JPEG.

What is the best format for the web?

WebP is generally the best choice for modern websites as it offers excellent compression and supports transparency. JPEG is best for complex photographs, while PNG is ideal for graphics with sharp edges, text, or transparency where lossless quality is required.

Formula Audited & Client-Side Private

Calculations are verified against standard mathematical and banking benchmarks. Data stays on your device in local memory.

Our Verification Standards →