Video to GIF Converter — No Upload

Most video-to-GIF sites want the file uploaded first, which is slow on a phone connection and awkward for anything private. This Video to GIF Converter does the whole job on your device. It reads the video with the browser’s own player, takes frames at the rate you choose, and writes the GIF file itself, so the video never leaves the page and nothing is kept afterwards.

How to Use It on a Phone Clip

1. Choose or drop an MP4, WebM or MOV. The range starts at 0 and ends at 5 s, or at the end of a shorter clip.
2. Play the video, pause where the moment begins and press the flag beside Start; do the same for End. Times can also be typed as 4.5 or 1:04.5.
3. Pick a frame rate, width, speed and whether it loops. The line under the settings shows what will come out, such as “30 frames at 320 × 180, 3.0 s long”.
4. Press Make GIF, watch the progress bar, then preview and download.

With no video loaded, Load Sample applies a preset and renders a 3-second demo animation through the same encoder. The lead preset of 10 fps at 320 px gives exactly that 30-frame, 320 × 180 result. The other presets cover smooth 15 fps at 480 px, a small 8 fps chat GIF, a 2× time-lapse and half-speed slow motion that plays once.

How the Math Picks 256 Colours

A GIF can hold only 256 colours, and a video frame has thousands. The converter samples pixels from every frame and splits that colour cloud by median cut: it keeps halving the group with the widest spread of red, green or blue until there are 256 groups, then uses each group’s average. Building one palette for the whole clip, rather than one per frame, is what stops colours from shimmering between frames. Each pixel then takes its nearest palette colour, and the rows of colour numbers are packed with LZW compression in codes of 3 to 12 bits.

Speed changes which moments are captured, not the playback timing. At 2×, a 12 fps GIF takes a frame every 0.167 s of video but still shows each one for 1/12 s, so a 10-second clip plays in 5.

Limits: Clip Length and Sound

Frames are held in memory until the palette is built, so one GIF is capped at 300 frames and 20 million pixels in total. That is about 10 seconds at 15 fps and 480 px, or the full 300 frames at 320 px. Asking for more stops with a message naming the frame count and size, and a range typed backwards is refused with “End time must be after the start time.”

GIFs carry no sound, and a long or wide one gets heavy: the format compresses flat areas well but not film grain or camera noise. Lower the width or frame rate first when the file is too big to send. A video the browser itself cannot play, such as some HEVC files on Windows, cannot be converted here either.