Free Image Compressor — Reduce Photo File Size Online
Compress JPG, PNG, WebP, HEIC and more in your browser. Smaller files for email, web, and storage — nothing is uploaded to our servers.
Our free image compressor shrinks photo file sizes while keeping visual quality acceptable for sharing, websites, and archives. Upload your pictures, adjust compression settings, and download lighter files in seconds — all processed locally on your device.
What This Tool Does
The image compressor reduces the byte size of photos using modern browser encoding. It re-encodes images at a chosen quality level and can optionally resize oversized dimensions. Unlike server-based compressors, your files never leave your computer or phone.
This is ideal when email attachments exceed limits, website images load too slowly, or you need to free storage space without deleting memories. The tool works with common formats including JPG, PNG, WebP, AVIF, HEIC, GIF, BMP, TIFF, and PSD inputs.
How to Compress Images
- Open the image compressor and drop one or more files onto the upload area.
- Choose Smart output to pick an efficient format per file, or select JPG, WebP, or AVIF manually.
- Move the quality slider — lower values create smaller files; higher values preserve more detail.
- Optionally enable max width and height to scale down very large camera photos.
- Click Compress all, review the before/after sizes, then download individual files or a ZIP.
Key Features
- Batch compression for multiple images at once
- Smart format selection or manual JPG / WebP / AVIF output
- Adjustable quality slider (30–95%)
- Optional resize with max width and height
- Before and after file size comparison on every result
- Download as separate files or one ZIP archive
- 100% browser-based — no uploads, no watermarks, no account
Privacy and Security
Compression runs entirely in your browser using Canvas and WebAssembly encoders. XConverters does not receive, store, or analyze your image bytes. This makes the tool suitable for personal photos, client work, and confidential scans.
Private by design: Your files stay on your device from upload to download.
When to Use Image Compression
- Email and messaging: Stay under attachment size limits.
- Websites and blogs: Faster page loads with lighter hero and gallery images.
- Social media: Quicker uploads on mobile networks.
- Cloud backup: Save storage space while keeping albums.
- Forms and portals: Meet maximum upload size requirements.
Tips for Best Results
- Start around 70–80% quality for photos — adjust if the result looks too soft.
- Use WebP or AVIF for the smallest files when compatibility allows.
- Enable resize for 4000px+ camera images even if quality is already good.
- Keep originals until you verify the compressed version is acceptable.
- PNG screenshots with text may compress better as WebP than as low-quality JPG.
Frequently Asked Questions
Is the image compressor free? Yes, with no sign-up required.
Are my images uploaded? No. Processing is local in your browser.
Will compression reduce image dimensions? Only if you enable max width/height. Otherwise pixels stay the same.
Can every file get smaller? Already heavily optimized files may not shrink much. Try a lower quality or different output format.
Does it support HEIC from iPhone? Yes. HEIC files can be compressed to JPG or WebP in the browser.
Can I compress many files at once? Yes. Add multiple images and compress them in one batch.