Video Processing

Remove a coloured background, with a preview that runs the export own arithmetic. Eyedropper colour picking, two named similarity measures, spill suppression, and a choice between a transparent MOV and a composite onto a new background.

Record a screen, a window or a browser tab with system audio, your microphone, both or neither. The finished WebM carries its own length, so it seeks and scrubs where a plain browser recording reports no duration at all. Nothing is uploaded.

Re-encode a video smaller with H.264 CRF, a speed preset that really reaches the encoder, and a downscale that keeps the shape. Measures a sample to predict the size, then shows what the file actually came out as.

Cut a rectangle out of every frame, with the selection drawn over the picture itself and held in source pixels. Numeric entry, shape and platform presets, and the even-number rounding H.264 forces printed before it is applied rather than after.

Convert a video between MP4, WebM, OGG, MOV, AVI and MKV, each naming the codecs it really writes and each producing a file that actually plays. One quality dial normalised into four different encoder scales.

Reads your file's real frame rate with FFmpeg, then converts to 24, 30, 60, 120 fps or any custom rate. Frame duplication, blending, or true motion interpolation, with CRF quality control and a verified output readout.

Repeat a clip by count or to a target length, and choose what happens at the joint: a hard cut that copies without re-encoding, a boomerang, a cross blend or a fade through black. For Stories, backgrounds and cinemagraphs.

Join clips end to end, saying in advance whether they can be stitched together untouched and, when they cannot, exactly which differences stop it. Clips of different sizes are letterboxed into one frame rather than squashed.

Remove, silence or re-level the soundtrack without re-encoding a single frame. The picture is copied bit for bit, and the output keeps your container with an audio codec it can hold. No uploads, everything runs in your browser.

Encode by constant quality (CRF), average bitrate, or an exact target file size with two-pass. Aspect-safe scaling from 360p to 1440p, audio and container control, and a measured SSIM quality score on the result.

Play a video backwards, or forward and then backward, at a speed that reaches the file. Reverse the sound, keep it running forwards, or drop it. The memory a reversal needs is worked out from your own clip.

Turn or mirror a video in the pixels rather than in a container flag, so it is upright everywhere. Says where each edge of the source will end up, composes the turn and the mirror in a stated order, and always writes MP4.

Speed a video up or slow it down, choosing what happens to the pitch (time stretch or resample) and to the frames (keep the rate or keep every frame). Both choices reach the export, and the finished length is read back off the file.

Burn subtitles permanently into the picture. SubRip, WebVTT and Advanced SubStation all read, every cue listed with the exact frames it covers, and the styling set as a percentage of the frame.

Take frames out of a video by index rather than by guesswork. The frame rate is measured, every image is labelled with the frame it came from, and they all come down as one ZIP archive.

Take the soundtrack out of a video. Copy the existing track sample for sample, or re-encode to MP3, M4A, AAC, OGG, WAV or FLAC with the cost of that choice stated before you run it.

Convert a video clip to an animated GIF with a palette built from your own frames, four dithering modes each labelled with its measured size cost, a loop count that really reaches the file, and frame rates marked for whether a GIF can hold them exactly.

Cut a clip out of a video, choosing whether the cut lands on the exact frame (re-encodes to MP4) or leaves the streams untouched (instant and lossless, but only at a keyframe). The result says which ran and reads the real length back off the file.

Add a text or logo watermark placed in the file own pixels, so the preview is where the export puts it. Nine positions, exact placement by dragging, a tiled mode a crop cannot remove, and sizes as a percentage of the frame.