Free Online Image Converter & Compressor | Convert PNG, JPG, WEBP, AVIF
Working with images across different formats and sizes is a daily challenge for designers, developers, content creators, and everyday users. RexaKit's Images Lab provides a streamlined suite of powerful image utilities designed to handle format conversion and intelligent compression with zero friction.
Unlike traditional online converters that upload your photos to remote servers, Images Lab processes everything locally in your browser. Your images never leave your device, making it the most secure way to convert and compress images online. Whether you're preparing images for web publishing, reducing file sizes for email attachments, or converting between formats for compatibility, Images Lab handles it all instantly.
From converting PNG screenshots to lightweight WEBP files, to compressing high-resolution photos to specific target sizes without visible quality loss — our image toolkit is your privacy-first, all-in-one solution.
Practical Use Cases
- Converting Images for Web Publishing: Quickly convert PNG images to modern WEBP or AVIF formats to drastically reduce page load times while maintaining visual quality.
- Compressing Photos for Email Attachments: Reduce large photo files to specific target sizes like 200KB or 1MB to meet email attachment limits without losing important visual details.
- Batch Format Standardization: Convert mixed-format image collections to a single standard format like JPEG for consistent handling across platforms and applications.
- Social Media Optimization: Compress and convert images to meet specific platform requirements while maintaining the highest possible visual quality within size constraints.
- Portfolio Preparation: Convert high-quality portfolio images to web-friendly formats with precise quality control for the perfect balance of file size and visual fidelity.
Key Benefits
- 100% Client-Side Processing: All image conversion and compression happens directly in your browser using the Canvas API. Your files are never uploaded to any server, ensuring complete privacy.
- Smart Target Size Compression: Specify exactly how large you want your output file to be. Our binary search algorithm automatically finds the optimal quality setting to match your target size.
- Multiple Format Support: Convert between PNG, JPG, JPEG, WEBP, BMP, GIF, and AVIF formats with full quality control for lossy formats like JPEG and WEBP.
- Visual Quality Comparison: See real-time before and after comparisons with exact file size reduction percentages so you can verify quality before downloading.
Frequently Asked Questions
Are my images safe and private?
Absolutely. Images Lab processes all images locally using your browser's Canvas API. No data is ever uploaded to a remote server, making it 100% secure for sensitive or personal images.
What image formats are supported?
Images Lab supports PNG, JPG, JPEG, WEBP, BMP, GIF, and AVIF formats. Note that AVIF support depends on your browser — most modern browsers support it, but older ones may not.
How does the target size compression work?
Our smart compression uses a binary search algorithm to find the optimal JPEG quality setting that produces a file as close to your target size as possible — typically within 5% of the specified size.
Is there a file size limit?
Since everything happens on your device, the only limit is your browser's available memory. Most modern devices can easily handle images up to 20-50 megapixels without issues.
