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Convert AVIF to GIF Online Free — Fast Batch Conversion
How to Convert Images Online
1Upload your AVIF
Click the upload button or drag and drop your AVIF file. Animated and static AVIF both supported.
2Configure settings
Choose dithering (Floyd-Steinberg for photos, none for pixel art), palette size, and transparency threshold.
3Download GIF
Click Convert and download your GIF. Files are deleted immediately after download.
Supported Image Formats
GIF
Classic format for simple animations. Supports transparency and up to 256 colors.
AVIF
Next-gen format with excellent compression. Up to 50% smaller than JPG.
HEIC
Apple photo format used by iPhone and iPad. High quality with small file size.
HEIF
High Efficiency Image Format — same as HEIC, used on Apple devices.
WebP
Modern image format by Google. Up to 30% smaller than JPG with the same quality.
PNG
Lossless format that preserves every pixel. Best for screenshots and logos.
JPG
Universal format for photos. Supported everywhere, great balance between quality and file size.
BMP
Uncompressed bitmap format. Maximum quality but very large file size.
TIFF
Professional lossless format used in printing and photography.
PPM
Portable Pixmap format used in Unix/Linux environments.
HDR
High Dynamic Range format storing extended brightness data.
FITS
Flexible Image Transport System used in astronomy and science.
PDF
Portable Document Format. Convert PDF pages to JPG, PNG or WebP images.
AVIF vs WebP vs HEIC vs JPG
Quick comparison to help you choose the right format
AVIF
- Size: Up to 50% smaller than JPG
- Browsers: Chrome, Firefox, Safari
- Transparency: ✓
- Best for: Web performance
WebP
- Size: 25-35% smaller than JPG
- Browsers: All modern browsers
- Transparency: ✓
- Best for: Web compatibility
HEIC
- Size: ~50% smaller than JPG
- Browsers: Safari only
- Transparency: ✓
- Best for: iPhone storage
JPG
- Size: Baseline
- Browsers: All browsers & apps
- Transparency: ✗
- Best for: Universal sharing
Frequently Asked Questions
- Does AVIF to GIF lose quality?
- Yes — dramatically. 10-bit HDR color is tone-mapped to SDR, then quantized from 16.7 million colors to 256. Alpha goes from 256 levels to binary. The GIF is also much larger. This is the most extreme format downgrade in image conversion.
- Does animated AVIF convert to animated GIF?
- Yes. Each AVIF frame is converted with full color reduction and written as a GIF frame. Frame timing and loop count are preserved. Visual quality suffers due to per-frame palette quantization.
- How much larger is the GIF compared to AVIF?
- Typically 5–15× larger for static images. A 200 KB AVIF may produce a 1–3 MB GIF. For animated content, the size gap is even wider because GIF LZW is inefficient on photographic data.
- What happens to HDR and 10-bit AVIF color?
- HDR transfer functions (PQ, HLG) are tone-mapped to SDR sRGB. 10-bit is quantized to 8-bit, then further reduced to 256 indexed colors. Smooth gradients may show severe banding.
- What happens to AVIF transparency in GIF?
- AVIF 8-bit alpha (256 opacity levels) is thresholded to GIF binary transparency. Semi-transparent pixels become fully opaque or fully transparent — smooth edges become jagged.
- Should I use GIF or WebP?
- WebP for anything web-based (97% browser support, 24-bit color, 8-bit alpha). GIF only for Discord/Slack emoji, Outlook email, GitHub README, and legacy platforms that require .gif format.
- Can I batch convert AVIF to GIF?
- Yes. Upload up to 10 AVIF files and download them all as GIF simultaneously.
- Can I use this for Discord emoji?
- Yes. Discord animated emoji requires GIF, exactly 128×128 px, under 256 KB, max 50 frames.
The most extreme format downgrade in image conversion
AVIF supports billions of colors (10-bit: 1.07 billion per channel combination), HDR with PQ and HLG transfer functions, BT.2020 wide gamut, full 8-bit alpha transparency, and AV1 compression that produces files 50% smaller than JPEG. GIF supports exactly 256 colors per frame, no HDR, sRGB only, binary transparency, and LZW compression from 1987.
Every one of these capabilities is lost in the conversion. 10-bit color is quantized to 8-bit, then further reduced to a 256-entry palette. HDR is tone-mapped to SDR. Wide gamut is compressed to sRGB. Alpha is thresholded to on/off. The resulting GIF is also dramatically larger — where AVIF achieves 50% better compression than JPEG, GIF's LZW on photographic content produces files many times larger.
The conversion is purely a compatibility play for platforms that support nothing else.
HDR and 10-bit AVIF: what happens to wide color
AVIF files from modern cameras and HDR workflows carry 10-bit precision with PQ or HLG transfer functions and BT.2020 color primaries. GIF is an 8-bit sRGB format with no concept of HDR or wide gamut.
Convertify first tone-maps HDR content to SDR sRGB — applying the PQ or HLG curve, converting BT.2020 primaries to sRGB, and quantizing from 10-bit to 8-bit. Then the 8-bit sRGB image undergoes standard GIF palette quantization from 16.7 million colors to 256. The two-stage reduction means smooth gradients visible in the AVIF — sunsets, skin tones, atmospheric haze — may show severe banding in the GIF output even with dithering enabled.
For intermediate quality with broader compatibility than AVIF, try AVIF to WebP (97% browser support, 24-bit color).
Animated AVIF to animated GIF
AVIF supports animation through image sequences (AVIF sequences, defined in the HEIF specification). Convertify reads each frame, applies the full color reduction pipeline (HDR tone mapping → 8-bit quantization → palette quantization → dithering → alpha threshold), and writes the result as a multi-frame GIF89a.
Frame timing is preserved — AVIF stores durations per frame, which map to GIF's centisecond delay values. Loop count transfers directly. The visual quality penalty is compounded for animation because each frame is independently quantized, and inter-frame color palette variation can cause flickering in smooth-gradient areas.
Animated AVIF browser support is less consistent than static AVIF — some Safari versions render only the first frame. If your animated AVIF does not play in a specific browser, converting to GIF is a practical fallback.
File size: AVIF vs GIF
AVIF achieves roughly 50% better compression than JPEG and is vastly more efficient than GIF on photographic content. A static AVIF photograph at 200 KB may produce a GIF of 1–3 MB at the same resolution after palette quantization — the GIF is 5–15× larger.
For animated content, the gap is even wider. AVIF animation at equivalent quality to a mid-range GIF produces files several times smaller. Converting back to GIF reverses all those compression gains.
If the GIF exceeds your target platform's size limit, reduce resolution to 480p, lower the palette to 64–128 colors, reduce frame rate, or accept that GIF is not the right container for your content at that size.
When AVIF to GIF conversion is justified
The same narrow set of platforms that require GIF from any source: Discord custom emoji (GIF only, 128×128, under 256 KB), Slack custom emoji (GIF only, under 128 KB), Outlook desktop email (renders GIF frame 1 only, does not render AVIF at all), GitHub README files (inline GIF animation supported, AVIF not rendered), phpBB and vBulletin forum signatures, and Giphy/Tenor uploads.
For all other uses, keep AVIF or convert to WebP (smaller than GIF, 97% browser support) or PNG (lossless, universal support for static images). Converting AVIF to GIF should be a last resort, not a default workflow.
How Convertify converts AVIF to GIF
libvips loads the AVIF via vips_heifload() with libaom or dav1d decoding the AV1 bitstream. For HDR content, vips_icc_transform applies BT.2020-to-sRGB conversion and the PQ/HLG transfer function is mapped to gamma. The resulting 8-bit sRGB VipsImage is quantized to a 256-color palette using median-cut with optional Floyd-Steinberg dithering.
Alpha above 50% becomes opaque; below becomes the transparent palette index. For animated AVIF, each frame is processed independently and written as a GIF89a frame with the original delay converted to centiseconds. The Netscape Application Extension block sets the loop count.
For static AVIF, the output is a single-frame GIF. All processing happens in memory with files deleted immediately after download.