JPG Converter
Convert JPG images to any format. Choose PNG for lossless, WebP for web, or AVIF for maximum compression.
Drop images here or click to browse (up to 10)
JPEG, PNG, WebP, AVIF up to 50MB each
JPG Conversion Guide
To PNG
Lossless format for editing and archival. Files will be larger but no further quality loss.
To WebP
25-35% smaller files with similar quality. The modern web standard.
To AVIF
40-50% smaller than JPG. Best compression available but slower encoding.
Keep JPG
JPG remains the most compatible format. Stay with it for email and legacy systems.
Converting JPG Files: Selecting the Optimal Target Format for Every Scenario
JPG remains the most widely encountered image format, accounting for 72% of all images served on the web according to HTTP Archive's 2025 annual report. Despite this dominance, there are compelling reasons to convert: WebP offers 25-34% better compression, AVIF pushes that to 50%, and PNG provides lossless preservation when the source JPG will undergo further editing. The right choice depends entirely on what happens to the image after conversion.
Converting JPG to WebP is the lowest-risk modernization step for web projects. The conversion preserves visual quality while shrinking file sizes substantially. A 150 KB JPG product photo typically converts to a 95-110 KB WebP at equivalent perceptual quality. Multiply this across an e-commerce catalog of 10,000 products, and the storage and bandwidth savings become substantial — roughly 400-550 MB less data transferred per full catalog view cycle.
The decision between WebP and AVIF output often comes down to encoding time constraints. WebP encodes approximately 4x faster than AVIF at comparable quality settings. For real-time applications — user-uploaded profile photos, live chat image attachments, CMS image pipelines with publish-time encoding — WebP's speed advantage makes it the practical choice. AVIF is better suited for pre-built static sites and CDN-cached assets where encoding happens once during deployment.
Converting JPG to PNG is sometimes necessary but rarely optimal for web delivery. The primary valid use case is when you need to edit the image further: each JPG re-save degrades quality, so converting to PNG before editing freezes the current quality level. For archival purposes, TIFF would be preferable, but since Krunkit focuses on web formats, PNG serves as the practical lossless intermediate format in browser-based workflows.
Pro Tips
Profile your image content type before choosing a target format
Photographic content (complex textures, gradients) compresses 30-50% better in AVIF than WebP. Graphic content (text overlays, flat colors, illustrations) shows a smaller gap of 10-20%. If your JPG collection is mostly photos, AVIF delivers the biggest payoff.
Avoid converting low-quality JPGs to lossless formats
A JPG saved at quality 30 already has severe block artifacts. Converting it to PNG simply preserves those artifacts at a much larger file size — often 5-8x larger. Keep heavily compressed JPGs in a lossy format, or use an upscaling tool to restore quality before lossless conversion.
Test with a representative sample of 10-20 images first
Compression efficiency varies dramatically by image content. Before batch-converting thousands of JPGs, run a sample batch and compare file sizes and visual quality. This 5-minute test prevents surprises like dark, low-contrast images producing unexpectedly large AVIF files.
Frequently Asked Questions
What formats can I convert JPG to?
You can convert JPG to PNG, WebP, or AVIF using Krunkit's free converter.
What's the best format for web images?
WebP offers the best balance of file size and browser compatibility. AVIF is even smaller but has slightly less browser support.
Can I convert JPG to PNG without quality loss?
The conversion itself is lossless, but any quality already lost in JPG compression cannot be restored.
Do I need to install anything?
No. The converter runs directly in your browser using WebAssembly technology.