Images

JPEG → AVIF

Learn about the formats: What is JPEG? What is AVIF?

Convert JPEG raster images to AVIF format instantly using ConvertX. This tool is designed for web developers and digital creators looking to modernise their image assets.

Both JPEG and AVIF are raster image formats, but AVIF is based on the AV1 video codec and offers advanced compression technology compared to the older JPEG standard. When converting from JPEG to AVIF, the pixel data is re-encoded into the AVIF container structure. Because both formats rely on lossy compression, the conversion process involves re-compressing already compressed data, which requires careful parameter tuning to avoid cumulative visual degradation.

Since both formats use lossy compression, converting JPEG to AVIF is a lossy-to-lossy operation. Repeated compression can lead to generational loss and artifacts if the quality settings are set too aggressively.

Tips

Avoid setting the AVIF quality too low during conversion to prevent compounding artifacts from the original JPEG.
Keep in mind that the file size may change only marginally since the source JPEG is already heavily compressed.
Test the converted AVIF across different browsers to ensure compatibility before deploying it on production websites.

Common use cases

Migrating legacy JPEG photo galleries to the AVIF format for modern browser experimentation.
Optimising web assets where gradual format transition is required without dramatic storage shifts.
Preparing photographic content for platforms that benefit from the AV1-based codec structure.

Why ConvertX stays free — forever

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Free tools today — and always

Every converter on ConvertX is free to use: no trials, no premium tiers, and no credit packs. We will never put core conversion features behind a subscription. Whether you convert one photo or a hundred files a week, the price stays zero.

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Many image, audio, and video conversions run entirely in your browser. Your files never leave your device for those jobs. When server processing is required for documents or specialized formats, uploads are handled securely and removed automatically — typically within one hour.

File formats: what to choose

A quick guide to strengths and trade-offs of popular formats — so you pick the right one before converting.

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Images

Raster and vector graphics for web, print, and photography.

Common extensions: PNG, JPG, WebP, AVIF, GIF, SVG, HEIC, TIFF

Advantages

+ WebP and AVIF offer excellent compression for the web
+ PNG keeps transparency and sharp edges
+ SVG scales without quality loss

Disadvantages

− RAW and TIFF files are large and slow to share
− JPEG loses quality on every re-save
− Some formats are not supported in older browsers

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Documents

Office files, PDFs, ebooks, and plain text.

Common extensions: PDF, DOCX, XLSX, PPTX, ODT, EPUB, TXT

Advantages

+ PDF locks layout for printing and sharing
+ DOCX and ODT are easy to edit collaboratively
+ Plain text works on any device

Disadvantages

− PDF is hard to edit without special tools
− Complex layouts may shift after conversion
− Scanned PDFs need OCR for editable text

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Video

Clips, streams, screen recordings, and movies.

Common extensions: MP4, WebM, MOV, MKV, AVI, MPEG

Advantages

+ MP4 (H.264/H.265) plays almost everywhere
+ WebM is efficient for web embedding
+ MKV can hold multiple audio and subtitle tracks

Disadvantages

− High-resolution video needs lots of storage and bandwidth
− Re-encoding always takes time and may reduce quality
− Some codecs require licensing for commercial use

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Audio

Music, podcasts, voice recordings, and sound effects.

Common extensions: MP3, WAV, FLAC, OGG, AAC, M4A, OPUS

Advantages

+ FLAC and WAV preserve full quality for editing
+ MP3 and AAC are universally compatible
+ OPUS delivers great quality at low bitrates

Disadvantages

− Uncompressed WAV files are very large
− Lossy formats cannot be restored to original quality
− DRM-protected files may not convert

Frequently asked questions

Not necessarily. Because both formats use lossy compression, the file size changes only insignificantly during this specific transition.

Yes, because both formats use lossy compression, re-encoding a JPEG into AVIF results in secondary compression that can degrade the image quality if not managed carefully.

Yes, both formats store images as a grid of pixels, unlike vector graphics.

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