Image Compressor

	Size (KB)	Dimensions
Original	{{ originalSizeKB }}	{{ originalWidth }} × {{ originalHeight }}
Compressed	{{ compressedSizeKB }}	{{ compressedWidth }} × {{ compressedHeight }}

Efficient image management hinges on delivering high-quality visuals at minimal file sizes. This Image Compressor empowers you to achieve that balance through client-side optimisation, safeguarding privacy while accelerating page loads and conserving bandwidth.

You can seamlessly drop or select photographs, fine-tune compression quality, convert formats, and preserve important metadata—without installing software or uploading assets to external servers. Every adjustment updates the preview instantly, enabling rapid iteration and informed decision-making.

Whether you are a web developer preparing production assets, a designer curating responsive galleries, or a marketer streamlining email campaigns, this utility provides granular control over file weight, resolution, and orientation, all packaged in an intuitive Bootstrap 5 interface.

Technical Details

The compressor relies on modern browser APIs and Compressor.js to perform lossless and lossy transformations entirely in the user’s environment.

Key Features

Select or drag-and-drop any JPEG, PNG, or WebP file.
Quality slider (10–100%) with real-time recompression.
Automatic EXIF-based rotation for correctly oriented output.
Optional preservation of original EXIF metadata.
Smart conversion of large PNGs to JPEG above a user-defined threshold.
On-device processing—no network transfer or server storage.
Side-by-side statistics table for original versus compressed dimensions and size.
Single-click download of the optimised image with updated extension.

Compression quality guide
Quality %	Typical Reduction	Recommended Use
90–100	<15 %	Archival photography, print layouts
70–89	15–40 %	Hero banners, product shots
50–69	40–60 %	Blog posts, newsletters
30–49	60–75 %	Thumbnails, social previews
<30	>75 %	Wireframes, low-bandwidth contexts

Step-by-Step Guide

Follow these steps to compress an image and retrieve the optimised file.

Click Select or drop image Input and choose a local file, or drag it onto the card.
Adjust the Quality slider to the desired value; the preview updates automatically.
Pick an Output Format (JPEG, PNG, or WebP) from the dropdown.
(Optional) Toggle Preserve EXIF metadata to retain camera details.
(Optional) Enable Auto-rotate to correct orientation based on EXIF data.
Specify a KB threshold under Convert PNG > JPEG to trigger smart format conversion.
Review the Original vs. Compressed statistics table for size and resolution changes.
Click Download Compressed Image to save the result locally.
If you wish to start over, press Reset Clears state.

FAQ

Find quick answers to the most common questions below.

Does compression occur on my device or a remote server?

All processing happens locally in your browser using Web Workers, ensuring privacy and eliminating upload latency.

Will image quality visibly degrade at 70 %?

At 70 %, most photographs retain perceptual fidelity on standard displays while reducing file weight by roughly one-third.

Why convert large PNGs to JPEG?

Photographic PNGs carry significant overhead; converting to JPEG at controlled quality can shrink size by 70–90 % without noticeable loss.

Do WebP outputs work in all browsers?

Modern Chromium-based and Firefox browsers support WebP natively. Older Safari versions require fallback formats.

Is there a file-size limit?

Limits depend on available memory. Images up to 40 MP or ~20 MB typically compress smoothly on contemporary hardware.

Troubleshooting

Address common obstacles with these targeted resolutions.

File fails to load — Ensure the format is JPEG, PNG, or WebP and the file is not corrupted.
Preview appears rotated — Enable Auto-rotate to apply EXIF orientation automatically.
EXIF data missing after download — Verify Preserve EXIF metadata is checked before compression.
Output size larger than original — Lower the quality slider or select a different format; PNG-to-PNG at high quality may expand size.
Browser freezes during compression — Compress very large images one at a time to avoid memory exhaustion.

Advanced Tips

Leverage these techniques for professional-grade optimisation workflows.

Batch optimise multiple images by invoking the tool in separate browser tabs.
Combine 80 % JPEG quality with WebP export for an ideal balance of compatibility and size.
Set the Convert PNG > JPEG threshold to 0 KB when converting an entire icon set.
Use the query-string synchronisation feature to bookmark specific quality and format presets.
Preface filenames with dimensions (e.g., 1200x800-hero.jpg) to facilitate responsive image pipelines.

Glossary

The following terms clarify technical references used throughout this guide.

EXIF: Embedded metadata describing camera settings, orientation, and timestamps.
Lossy Compression: Technique that discards visual information to reduce file size, potentially affecting fidelity.
Lossless Compression: Method that reduces size without altering image data, preserving original quality.
MIME Type: Standard identifier indicating the media format of a file (e.g., image/jpeg).
WebP: Modern image format designed by Google, offering superior compression compared with JPEG and PNG.