Convert AVIF, WebP, PNG, JPG, HEIF, JXL, and SVG images with zero server uploads. Full original quality by default, with optional resizing and compression controls.
Format Directory
All conversions run 100% locally in your browser with WebAssembly. No file size limits, no server uploads, and full quality preservation by default.
Turn AVIF photos and graphics into universally supported JPG files for email, social media, and older image viewers.
Drastically reduce PNG graphic weight for faster web performance without sacrificing transparency or image crispness.
Step up from WebP to AVIF for the highest compression efficiency available in modern web browsers today.
Extract AVIF assets into pixel-perfect PNG files with transparent backgrounds for Photoshop, Illustrator, and print design.
Reduce JPEG photo payloads by half with modern AVIF encoding for faster websites and improved SEO rankings.
Bridge the compatibility gap by converting AVIF files to WebP for 97%+ browser support and faster mobile decoding.
Turn WebP images downloaded from websites into standard JPGs for Microsoft Office, Photoshop, email clients, and printing.
Convert WebP graphics into uncompressed, transparent PNG files ready for editing in Photoshop, Illustrator, and Canva.
Trim 60–80% off heavy PNG files with WebP conversion while keeping full transparency and sharp graphic details.
Reduce JPEG photo payloads by 25–35% with modern WebP compression for faster site speed and improved Google rankings.
Turn iPhone HEIC and HEIF photos into universally compatible JPG images for Windows, Android, and web uploads.
Extract iPhone HEIF photos into lossless, high-resolution PNG format for graphic design, print, and editing.
Publish iPhone photos directly to the web by converting HEIF captures to lightweight, high-performance WebP images.
Convert next-generation JPEG XL images to universally supported JPG format for older devices and image software.
Render vector SVG code into high-resolution transparent PNG files for social previews, office documents, and web apps.
If you want automated lossy compression, dimension downscaling, and live visual comparison sliders across formats, try our all-in-one Image Compressor.
Privacy & Performance
Traditional file converter websites require you to upload your sensitive photos, invoices, personal receipts, and proprietary graphics to remote servers. This introduces bandwidth latency, data privacy hazards, and potential server-side data retention.
SpeedVitals executes the entire encoding and decoding process inside your local browser tab via WebAssembly binaries (@jsquash/avif, @jsquash/webp, libheif, and MozJPEG). Your files never leave your machine.
Images account for over 50% of the average webpage’s byte weight. Converting legacy PNGs and JPEGs to modern formats such as AVIF and WebP can reduce asset payload weight by up to 80% without noticeable degradation.
Faster image delivery directly improves your site’s Largest Contentful Paint (LCP), reduces bounce rates, and ensures full compliance with Google Core Web Vitals guidelines.
All conversions are executed directly inside your web browser using WebAssembly. Your files are processed locally on your machine and are never transmitted, stored, or analyzed on our servers.
No. By default, our converters operate at 100% quality (no lossy compression) and 100% original dimensions, ensuring maximum visual fidelity. You have the option to adjust the quality and resize sliders if you want to optimize for file size.
Yes. You can drop multiple images into any converter workspace to process them in parallel. When completed, you can download each image individually or grab the entire batch as a ZIP archive.
We support converting between AVIF, WebP, PNG, JPG/JPEG, Apple HEIF/HEIC, JPEG XL (JXL), and SVG vector files.
No. The converter runs directly in any modern web browser (Chrome, Safari, Firefox, Edge) without requiring plugins, sign-ups, or subscriptions.
From the SpeedVitals blog
