Add Transitions to Video
Drop two or more clips, click the cut between them, and pick from 55 transitions rendered live on your own footage rather than on stock previews. Set how long the blend runs, reuse one choice on every cut, and export. Codec support and processing speed vary by browser and device.
Previewed on your own clips
Every tile in the picker is the real effect running on the two frames that meet at the selected cut, so the choice is made on your footage instead of a sample reel.
Fifty-five effects in five groups
Dissolves, wipes and irises, motion pushes and spins, motion-blur cuts, and stylised looks such as film burn, glitch and light leak. Each cut in the timeline can use a different one.
Composited on your device
Frames are blended by a browser graphics shader and re-encoded with the browser video encoder. Supported video contents are not uploaded for processing; site analytics and the assistant are separate.
How to add a transition between two videos
- Open the tool and add your video Select a compatible file for Add Transitions to Video.
- Review and adjust Click the marker on the cut between two clips, pick an effect from the grid previewing on your own frames, then set how long the blend runs before exporting.
- Export and download Review the exported result from Add Transitions to Video, then download it.
Frequently asked questions
How many clips can I use?
Two or more, up to twelve in one pass. Each cut between neighbouring clips gets its own transition and its own length.
Why is the exported video shorter than the clips added together?
A transition overlaps its two neighbours, so the shared material is played once instead of twice. The studio shows how much total duration the overlaps remove before you export.
What happens to the audio?
Audio from every clip is mixed onto one timeline with an equal-power crossfade under each transition, then re-encoded. Clips without an audio track are treated as silence, and audio encoder availability varies by browser.
Why does a transition get limited on short clips?
A transition needs material either side of the cut. When the requested overlap would use most of the shorter neighbour the studio caps it and explains which clip is too short, because past that point the picture holds still at the cut.
Do the clips have to be the same size or frame rate?
No. The first clip sets the output frame and the others are fitted into it, and every clip is resampled to one output frame rate so the cut does not drift.
How to verify a Add Transitions to Video export
Treat the page preview and the downloaded file as separate evidence. Use a representative clip, keep the untouched source, and record the result that the task actually requires before changing any control.
- Before processing, note the source container, video and audio codecs when known, duration, dimensions, frame rate, orientation, audio-track count, and intended destination. Also record the exact cut, crop, timing, visual correction, or extraction you expect. These observations create a baseline for comparing the export instead of relying on memory.
- Run a short representative sample first and change one setting at a time. Browser codec support, available memory, hardware acceleration, and input structure can affect which processing path is available. A successful preview for one sample shows only that observed case; it does not establish compatibility for every file with the same extension.
- Inspect the preview around the portions most likely to expose defects: the beginning and final frame, cut boundaries, rapid motion, fine text, faces, object edges, gradients, orientation changes, and any section where sound should align with a visible event. For model-assisted tools, look for missed regions, unstable masks, invented detail, or frame-to-frame drift.
- Open the downloaded file in a separate current player rather than reviewing only the in-page preview. Confirm that it starts and ends where expected, plays through without an unexpected stall, and has the intended duration, dimensions, orientation, frame rate, audio presence, and synchronization. Check the file again in the platform or editor that will consume it.
- Compare the exported clip with the untouched source at the same viewing scale and, when useful, matched playback volume. Look for unexpected crops, padding, stretch, softness, banding, halos, color shifts, temporal jumps, repeated or missing frames, and changes in file size or codec that matter to the destination. Decide whether any difference is acceptable for the stated task.
- If the result is missing, fails to play, or differs from the preview, first confirm that the source opens independently. Reload the page, retry with a small controlled sample, reset optional controls, and preserve the exact on-page message. Testing one controlled change at a time makes browser, input, setting, and destination failures distinguishable.
- Record the Add Transitions to Video URL, relevant settings, browser and device, date, source identity, output filename, and observed checks. Keep before-and-after files when the result matters. This record supports a reproducible comparison later and avoids treating a changed input, capability, or destination requirement as the same run.