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Image Format Converter Hub

Pick the exact conversion you need. Files are converted on our server and deleted straight after. No account needed.

  • Free Core Tool
  • No Account Needed
  • Deleted After Conversion

Convert to modern formats

Smaller files, faster pages - convert to WebP or AVIF for web delivery.

Convert from modern formats

Maximum compatibility - convert modern formats to work everywhere.

Convert between standard formats

Standard format conversions for editing, sharing, and compatibility.

Image Format Conversion for the Modern Web

Choosing the wrong image format adds unnecessary file weight, slows page load, and reduces image search visibility. MeloTools converts between all major web image formats online, with no account required. Files are converted on our server and deleted straight after.

Format Reference: When to Use Each

AVIF: Best compression efficiency of any widely supported format in 2026. Typically 40-60% smaller than JPEG at equivalent visual quality. Use for all static web delivery where browser support allows (~94% global coverage).

WebP: 25-35% smaller than JPEG at equivalent quality. Near-universal browser support (~97%). Use as the primary format when AVIF is not an option, or as a fallback behind AVIF in <picture> elements.

JPEG: Best for photographs requiring universal compatibility: email, legacy systems, external sharing. Not suitable for transparency. Lossy compression accumulates with each re-save.

PNG: Lossless format. Use for transparency, UI elements, diagrams, screenshots, and any image that will be edited further. Larger than JPEG and WebP for photographic content.

HEIC: Apple's format for iPhone photos. Convert to JPEG or WebP before using on the web. Not natively supported in most browsers.

How MeloTools Conversion Works

Format converters send your file over an encrypted HTTPS connection to our server, which converts it and returns the result. The uploaded file and the converted copy are deleted as soon as the result is sent. On the free plan, files between 4.4MB and 5MB are converted in your browser instead. We log the file name, size and output format of each conversion to count usage. We do not store the image itself.

Frequently Asked Questions

Which format should I convert to for a website?

For most web use, convert to AVIF first, with a WebP fallback for older browsers. Use a <picture> element to serve AVIF to supported browsers and WebP to the rest. Both formats significantly outperform JPEG and PNG for web delivery.

Does converting between formats reduce quality?

Lossy conversions (to JPEG, WebP lossy or AVIF lossy) apply compression. Lossless conversions (to PNG, WebP lossless or AVIF lossless) do not. MeloTools defaults to balanced quality settings that preserve visual fidelity for typical web use.

Can I convert multiple images at once?

Yes. Drop multiple files into any converter simultaneously. The free plan processes up to 5 images per batch. Premium supports up to 50 images per batch.

What happens to my files?

Files are sent over an encrypted HTTPS connection to our server for conversion and deleted straight after. We log the file name, size and output format, not the image itself. If you only need to shrink an image, our compressor runs in your browser and does not upload it.