Convert Image Format

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Convert images between JPG, PNG, WebP, and AVIF formats in your browser. Optimize for web performance (WebP/AVIF), preserve transparency (PNG), or ensure universal compatibility (JPG). Quality control for lossy formats, automatic transparency handling, zero uploads.

How to Convert Image Formats

Upload source image (accepts JPG, PNG, WebP, AVIF, GIF, BMP)

Select target format based on need: JPG (universal), PNG (transparency), WebP (web), AVIF (smallest)

Adjust quality 70-95% for lossy formats (JPG/WebP/AVIF)—PNG is always lossless

For transparent images converting to JPG, choose background color to replace transparency

Download converted file—processing takes 1-3 seconds

Key Features

Format Decision Guide

JPG: Photos, universal compatibility, smallest with acceptable quality loss. PNG: Graphics/logos/text, lossless compression, supports transparency. WebP: Modern web standard, 25-35% smaller than JPG, 95% browser support. AVIF: Cutting-edge codec, 50% smaller than JPG, 80% browser support (Chrome/Firefox/Safari 16+).

Smart Transparency Management

Converting PNG with transparency to JPG? Select background color (white, black, custom hex). Tool automatically detects transparent pixels and fills with chosen color. Converting to PNG/WebP/AVIF preserves transparency perfectly. Preview shows transparency handling before download.

Compression vs Quality Trade-offs

Lossy formats (JPG/WebP/AVIF): Quality slider 1-100%. 85-90% indistinguishable from original, saves 40-60%. 70-80% visible quality loss, saves 60-80%. PNG always lossless—file size reduction via better encoding only. Use PNG for text/graphics, lossy formats for photos.

Browser Compatibility Intelligence

WebP supported by 95% of browsers (all modern, fails IE11). AVIF supported by 80% (Chrome/Edge/Firefox/Opera/Safari 16+, fails older Safari). For critical images, provide JPG fallback using <picture> element with multiple sources. Tool warns about format support before conversion.

Performance Optimization Benefits

Converting photos JPG→WebP: 25-35% smaller files, same visual quality. JPG→AVIF: 50% smaller, identical quality. Faster page loads improve Google PageSpeed scores. Every 100KB saved = 0.5s faster mobile load. For e-commerce, converting 50 product images saves 2-5MB total page weight.

Privacy & Security

All format conversion happens in your browser using HTML5 Canvas API and JavaScript. Files never upload to servers—we have zero access. Verify by opening DevTools (F12) → Network tab → convert image → observe zero network activity. EXIF metadata automatically stripped during conversion (GPS coordinates, camera settings, timestamps removed). Works offline after initial page load. Ideal for sensitive conversions: confidential designs, medical imaging, proprietary product photos, legal documents.

Frequently Asked Questions

Which format should I choose for different use cases?

Photos for web: WebP (best balance of size/support) or AVIF (smallest, modern browsers). Photos for email/universal: JPG at 85% quality. Logos/graphics: PNG for transparency, JPG if no transparency needed. Screenshots with text: PNG lossless. Product images: WebP with JPG fallback. Social media: JPG (most platforms auto-convert anyway). Print materials: PNG or maximum quality JPG to avoid compression artifacts.

What happens to transparent backgrounds when converting to JPG?

JPG doesn't support transparency—format limitation, not tool issue. You must select background color to fill transparent pixels. Default white works for most cases. Black for dark mode designs. Custom hex color for brand-specific backgrounds. Preview shows result before download. For maintaining transparency, convert to PNG or WebP instead.

Why is my converted WebP/AVIF file larger than original JPG?

Original JPG likely already heavily compressed (70-80% quality). Converting pre-compressed JPG to WebP at 90% quality can increase size. Solution: Lower quality slider to 75-80% when converting. Or keep original JPG if already optimized. WebP/AVIF advantages appear when converting from PNG or high-quality JPG (95%+) sources.

Do all browsers support WebP and AVIF formats?

WebP: 96% global browser support (Chrome, Firefox, Edge, Safari 14+, Opera). Fails: IE11, very old Android browsers. AVIF: 80% support (Chrome 85+, Firefox 93+, Safari 16+, Edge 121+). Fails: older Safari, IE, legacy browsers. Browser automatically picks first supported format.

Does format conversion reduce image quality?

Depends on target format. PNG conversion: always lossless, zero quality loss. JPG/WebP/AVIF: lossy compression—quality slider controls degradation. At 85-90%, losses imperceptible to human eye. Below 75%, visible artifacts appear. Converting between lossy formats compounds quality loss—always convert from highest quality source available, never re-compress compressed files.

Why does converted file lose EXIF data (GPS, date, camera)?

Canvas API strips all metadata during processing—browser security feature, not tool limitation. EXIF removal prevents GPS tracking and metadata leaks (privacy benefit). For preserving EXIF (professional photography workflow), use command-line tools like ImageMagick or specialized software. For most users, EXIF stripping is desired security feature.

How much smaller is AVIF compared to JPG really?

Real-world tests: AVIF at quality 80 = JPG at quality 85-90 visual equivalence, but 45-55% smaller file. Example: 2MB JPG (90% quality) → 900KB AVIF (80% quality), indistinguishable quality. Savings compound with multiple images: 50 product photos = 100MB JPG → 45MB AVIF. Trade-off: encoding time 3-5× longer than JPG, browser support 80% not 100%.