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H.265 to H.264 Converter (Free, Online, No Upload)
Re-encode H.265 (HEVC) video to H.264 right in your browser. Nothing gets uploaded to a server. H.264 is supported by virtually every device, browser, and video player in existence. Use this when you need maximum compatibility. The conversion runs locally on your device.
Try it in your browser
Loading FFmpeg engine... (~31 MB)
Use the API
curl -X POST https://renderio.dev/api/v1/run-ffmpeg-command \
-H "X-API-KEY: ffsk_your_api_key" \
-H "Content-Type: application/json" \
-d '{
"ffmpeg_command": "-i {in_video} -c:v libx264 -crf 23 -preset medium -c:a copy {out_video}",
"input_files": {
"in_video": "https://example.com/input.mp4"
},
"output_files": {
"out_video": "output.mp4"
}
}'Need an API key? Get your free API key to start processing files programmatically.
Common Variations
Visually lossless quality
-i input.mp4 -c:v libx264 -crf 18 -preset slow -c:a copy output.mp4Web-optimized with faststart
-i input.mp4 -c:v libx264 -crf 23 -movflags +faststart -c:a aac output.mp4Baseline profile for older devices
-i input.mp4 -c:v libx264 -profile:v baseline -level 3.0 -crf 23 -c:a aac output.mp4Related Operations
Need to process at scale?
Automate this with the RenderIO FFmpeg API. Process thousands of files programmatically or through no-code video automation.