Universal Image Format Converter (Free & Bulk)

Why Use Our Universal Image Converter?

Supported Formats

Our universal image converter supports a wide range of input and output formats:

Format	Input	Output	Description
JPG/JPEG	✅	✅	Most common format for photos. Lossy compression.
PNG	✅	✅	Lossless format with transparency support.
WebP	✅	✅	Modern format with superior compression.
GIF	✅	✅	Input (first frame) / Output via gifenc. Static GIF only.
BMP	✅	✅	Uncompressed bitmap format. Lossless.
ICO	—	✅	Output only. Favicon format (max 256x256).
AVIF	✅	✅	Modern high-efficiency format. Output via WASM encoder.
SVG	✅	—	Input only. Vector graphics format.
TIFF	✅	—	Input only (via UTIF.js). High-quality format.
HEIC	✅	—	Input only (via heic2any). iPhone photo format.

Which Output Format Should You Choose?

Choose JPG when:

• Photographs: JPG is optimized for photos with many colors and gradients.
• Smaller file size: JPG produces smaller files than PNG for photographic content.
• Web usage: JPG is universally supported across all browsers and platforms.
• No transparency needed: JPG does not support transparency.

Choose PNG when:

• Lossless quality: PNG preserves every pixel without compression artifacts.
• Transparency needed: PNG supports full alpha channel transparency.
• Graphics & logos: PNG handles sharp edges, text, and solid colors better.
• Screenshots: PNG keeps text readable and sharp.

Choose WebP when:

• Smallest file size: WebP offers 25-35% smaller files than JPG at equivalent quality.
• Transparency with small size: WebP supports transparency like PNG but with much smaller files.
• Modern web: WebP is supported by all modern browsers (Chrome, Firefox, Edge, Safari).
• Quality control: WebP supports both lossy and lossless compression.

Choose GIF when:

• Universal compatibility: GIF is supported everywhere — all browsers, all platforms.
• Simple graphics: GIF works well for logos, icons, and simple graphics with limited colors (256 max).
• Static images: Our tool outputs static GIF (single frame), not animated.
• Small file size for simple images: GIF uses LZW compression, efficient for flat-color images.

Choose BMP when:

• Lossless quality: BMP is an uncompressed format — every pixel is preserved exactly.
• Windows compatibility: BMP is natively supported on Windows without any codec.
• Simple processing: No compression artifacts, easy to read pixel-by-pixel.
• Large file size warning: BMP files are much larger than JPG/PNG/WebP.

Choose ICO when:

• Favicons: ICO is the standard format for website favicons.
• Windows icons: Used for application icons on Windows.
• Size limit: ICO format supports up to 256x256 pixels. Larger images will be downscaled.
• Universal browser support: All browsers support ICO for favicons.

Choose AVIF when:

• Best compression: AVIF offers 50% smaller files than JPG at equivalent quality — better than WebP.
• High dynamic range: AVIF supports HDR, wide color gamut, and 10/12-bit color depth.
• Modern web standard: AVIF is supported by Chrome, Firefox, and Edge (Safari support limited).
• Slower encoding: AVIF encoding uses WASM and may take longer than other formats.

Frequently Asked Questions (FAQ)

Q1: What image formats are supported?

Our universal converter supports 9 input formats: JPG, PNG, WebP, GIF, BMP, AVIF, SVG, TIFF, and HEIC. You can convert them to 7 output formats: JPG, PNG, WebP, GIF, BMP, ICO, and AVIF.

Q2: Why can't I convert to SVG, TIFF, or HEIC?

SVG is a vector format and cannot be created from raster images. TIFF and HEIC have no stable browser-side encoding libraries. For TIFF/HEIC input, we decode them using UTIF.js and heic2any respectively, then encode to one of the 7 supported output formats.

Q3: Is it safe to use this image converter?

Yes, it is 100% safe. Our tool works entirely offline inside your browser using client-side JavaScript and WASM. Your images are never uploaded to a server, ensuring total data privacy.

Q4: Can I convert multiple images at the same time?

Yes. Our tool supports free batch conversion for up to 10 images simultaneously. You can drag and drop a group of files or select them via the file picker, then download them all as a single ZIP file.

Q5: Does GIF output preserve animation?

No. Browser Canvas API can only decode the first frame of a GIF image. The converted output will be a static image, not an animated one. Our GIF encoder (gifenc) also outputs single-frame GIFs.

Q6: What is the maximum file size allowed?

We support image files up to 10MB per image for batch processing. If your image is larger than 10MB, we recommend resizing its dimensions before conversion.

Q7: Why does the quality slider disappear for PNG, BMP, and ICO?

PNG, BMP, and ICO are lossless formats — no compression quality adjustment is needed. The quality slider only appears for JPG, WebP, GIF, and AVIF formats, which use lossy compression.

Q8: How does HEIC to other formats conversion work?

Since the heic2any library only supports JPG and PNG output, HEIC to WebP/GIF/BMP/ICO/AVIF conversion is done in two steps: first converting HEIC to PNG, then re-encoding the PNG to the target format via Canvas API.

Q9: How does AVIF encoding work?

AVIF encoding uses the @jsquash/avif WASM library, which is dynamically loaded from a CDN on first use. The encoder may take a few seconds to load and process. AVIF offers the best compression ratio of all supported output formats.

Q10: Why is ICO limited to 256x256 pixels?

The ICO format specification supports a maximum size of 256x256 pixels. If your image is larger, it will be automatically downscaled to fit within the 256x256 limit. ICO is primarily designed for favicons and application icons.