Free Online Image Converter 2026: Convert JPG, PNG, WebP, AVIF, HEIC in Browser

Need to convert an image to a different format but don't want to install software or upload files to an unknown server? Picovert converts images entirely in your browser — the pixels never leave your device. This guide covers all supported conversions, which format to choose for each use case, and how the conversion works.

Supported Image Conversions

Picovert supports the following format combinations:

• JPG → WebP: Convert JPG to WebP — 25–35% smaller files for web use
• PNG → WebP: Convert PNG to WebP — smaller files, preserves transparency
• JPG → AVIF: Convert JPG to AVIF — 35–50% smaller than JPG, best compression in 2026
• PNG → AVIF: Convert PNG to AVIF — with transparency support
• WebP → PNG: Convert WebP to PNG — for app compatibility, preserves transparency
• WebP → JPG: Convert WebP to JPG — for smaller photo files with maximum compatibility
• AVIF → PNG: Convert AVIF to PNG
• AVIF → JPG: Convert AVIF to JPG
• HEIC → JPG: Convert HEIC to JPG — iPhone photos for Windows and web compatibility
• HEIC → PNG: Convert HEIC to PNG
• BMP → WebP: Convert BMP to WebP
• TIFF → WebP: Convert TIFF to WebP
• PNG → ICO: Convert PNG to ICO — favicon creation
• JPG → ICO: Convert JPG to ICO — favicon creation

Which Format Should I Convert To?

For Web Use (Website, Blog, E-commerce)

• Best choice: WebP — Supported by all modern browsers (Chrome, Firefox, Safari, Edge). 25–35% smaller than JPG. Supports transparency like PNG. The practical standard for web images in 2026.
• Even better: AVIF — 35–50% smaller than JPG. Supported by ~93% of browsers as of 2026. Best for large images where file size matters most.
• Safe fallback: JPG — 100% browser compatible. Best for photos when you need guaranteed support everywhere.

For Editing and Design Tools

• PNG — Lossless, supports transparency. Use for logos, icons, UI elements, screenshots. Compatible with Photoshop, GIMP, Figma, Canva, and every design tool.
• JPG — Use for photos when you don't need transparency. Compatible everywhere.
• Avoid HEIC and WebP for editing — Some older design tools can't open these formats. Convert to PNG or JPG first.

For Email and Office Documents

• JPG — Maximum compatibility with email clients and Office applications. 25–35% smaller than WebP at equivalent quality.
• PNG — For graphics with text or logos. Lossless quality.
• Avoid WebP for email — Older Outlook versions don't render WebP inline.

For iPhone Photos (HEIC)

iPhone photos are saved in HEIC format by default — a format that most Windows apps, email clients, and web services can't open. Convert to JPG for universal compatibility. Use Picovert's HEIC to JPG converter.

How Online Image Conversion Works (and Why It's Safe)

Traditional online image converters upload your files to their servers, process them, and then send the result back. Your photos exist on a third-party server and you don't know how long they're stored.

Picovert is different. All conversions run using the Canvas API and WebAssembly in your browser. The image data never leaves your computer — the "conversion" happens locally on your device, the same way a desktop app would work, just without installation. After you close the tab, there's nothing on any server.

Format Comparison: File Size at Equivalent Quality

Starting from a 1920 × 1080 px photo at camera quality:

Can I Convert Multiple Images at Once?

Yes. Every converter on Picovert supports batch conversion — drop multiple files at once and they all convert simultaneously. After conversion, each file is available to download individually, or you can download a ZIP of all files.

Is There a File Size Limit?

No server-side limit because no files are sent to a server. The practical limit is your browser's memory. In testing, single images up to 50 MB and batches of 20+ images convert without issue in modern browsers. Very large RAW files or extremely high-resolution images (50+ megapixels) may require several seconds or cause browser slowdown.