Free Online Image Compressor
Compress JPG, PNG, WebP, and AVIF photos in your browser. Slash file weights for websites, job applications, and email attachments with zero quality compromise.
Drop an image here
or choose files (single or batch)
JPG · PNG · WebP · AVIF · HEIC
High-Performance Image Compression
Intelligent optimization algorithms designed to slash bandwidth without pixel distortion
Fine-Tuned Quality Sliders
Take precise command over compression quantization. Dial in the sweet spot between featherweight byte size and crisp photographic sharpness.
Live Byte Breakdown
See original size versus compressed size in real time. Know exactly how many kilobytes or megabytes you saved before downloading.
Zero Network Upload Wait
Never wait for slow 10 MB uploads over cellular or slow connections. Image encoding happens in milliseconds using your local device processor.
How to Compress Images in 3 Steps
Select Image
Drop your JPG, PNG, WebP, AVIF, or HEIC file into the compression zone.
Set Quality & Scale
Adjust the quality slider (80%-85% recommended) or scale dimensions to shrink file size.
Download Compressed File
Compare original vs compressed preview and click Download to save your optimized photo.
Image Compression FAQs
Everything you need to know about reducing image sizes without losing clarity
How do I reduce image file size to meet upload limits (e.g. under 200 KB)?
Drag your photo into the compressor and set your target format to WebP or JPG. Adjust the compression slider to between 70% and 80%, or choose a dimension resize preset (such as 75% or 50%). Our tool recalculates file size instantly in memory so you can hit exact byte requirements.
Will compressing my images reduce their visual quality?
Modern codecs like WebP and AVIF allow 30% to 50% byte reduction with virtually indistinguishable visual difference from the original. You can use our interactive split-view comparison slider to inspect pixels before saving.
Which image format provides the best compression ratio?
AVIF delivers the strongest compression efficiency, reducing sizes up to 50% compared to JPG. WebP is the runner-up with 25%–35% savings and universal browser support. For photos with transparent backgrounds, converting PNG to WebP yields massive savings.
Are my confidential documents and photos safe from data harvesting?
Yes, completely. Unlike online cloud compressors that upload your files to remote servers, ConvertImage processes all compression directly inside your device memory using HTML5 Canvas. Your files never touch a server.