WebEdit Pro FAQ

Answers about WebEdit Pro, from the first cut to the saved video. Open the editor

Last Updated: November 14, 2026

1. Basics

Q1: What is WebEdit Pro?

A1: A free video editor that runs in your browser. It cuts, splits and trims a video on a timeline, changes its colour, adds text, subtitles, music and sound fades, fades and transitions, video layers with green screen, changes the speed and the shape, and saves the result as a new MP4 or WebM video.

Q2: Is it free, and do I need an account?

A2: It is free and there is no account or registration. Like every page on ZeroDataUpload, it is supported by advertising.

Q3: Is my video uploaded?

A3: No. The videos, pictures and sound files you open are played, edited and recorded by this browser on your device and are never sent to a server. The page itself, its ads and its analytics load from the internet as on any website.

Q4: What is kept in my browser?

A4: Your edit of the open video (the cuts, colours, texts, subtitles, markers, fades, transitions, speed and sound settings, never the video itself) after your first change, so it comes back when you open the same video again, and the colour profiles you keep. Nothing is written before your first change. New project and Discard it remove the edit; clearing this site's data in the browser removes everything.

Q5: Which browsers does it work in?

A5: Current versions of Chrome, Edge, Firefox and Safari on computers. Phones and tablets can open and edit videos too, but saving records the video as it plays, which works best on a computer. Which videos open and which formats can be saved depend on the browser.

2. Opening a video

Q6: Which videos can it open?

A6: Videos of up to 500 MB that this browser can play. Most browsers play MP4 (H.264) and WebM; MOV files from phones open where the browser can play their contents. If a video does not open, the site's media converter can turn it into MP4 or WebM first.

Q7: Why is the sound picture missing under my video?

A7: The sound picture and Normalize read the whole sound into memory, so they are made for videos of up to 300 MB and 30 minutes. A longer video still plays and saves with its sound.

Q8: Does it keep the original file?

A8: Yes. Your video is never changed. Saving makes a new file with your edit.

3. Cutting and trimming

Q9: How do I cut out a part of my video?

A9: Move the playhead to where the part begins and press Start selection (or I), move to where it ends and press End selection (or Shift+E), then press Delete selection. Or press Split (or S) at both ends, click the clip between them on the timeline and press Delete chosen clip. The saved video jumps over removed parts.

Q10: What is the difference between Split, Cut and Trim?

A10: Split cuts the clip under the playhead in two at that moment. The Cut tool does the same with a click on the picture (at the playhead) or on a clip (where you click). The Trim tool shows two handles for the start and the end of the whole edited video. You can also drag the ends of any clip to trim it.

Q11: Can I move a clip?

A11: You can slide a clip between its neighbours by dragging its middle on the timeline: it keeps its length and shows another part of your video. Clips always play in the order of your video.

Q12: What does Snap do?

A12: With Snap on, clicks and drags on the timeline go to the nearest whole second, clip edge or marker when one is close. Turn it off for free placement; zoom in for fine work.

Q13: Can I undo?

A13: Yes. Ctrl+Z (or the arrow buttons) undoes and Ctrl+Y redoes, up to 49 steps. A slider is one step when you let go of it.

4. Colour and look

Q14: What do the looks do?

A14: Each look is a set of standard filters on top of your brightness, contrast and saturation: Grayscale, Sepia, Vintage (half sepia, more contrast, a little darker), Cinematic (more contrast, a little darker and less colourful), Cold and Warm (cooler or warmer, with less or more colour) and Noir (black and white with strong contrast).

Q15: What is colour grading?

A15: Warmth adds red and takes away blue (or the other way), Tint moves between green and magenta, Shadows lifts or deepens the darkest parts, Midtones brightens or darkens the middle greys and Highlights brightens or dims the brightest parts.

Q16: What does the Color Harmonizer do?

A16: It measures brightness, contrast and colour in frames of a video. Many clips moves several clips towards their average look and downloads them or merges them into one video. Match a reference sets your video's brightness, contrast and saturation towards another video. Automatic fixes and Profiles are described below.

Q17: Is Smart fix done by artificial intelligence?

A17: No. Smart fix measures your video's brightness and contrast at eight moments and applies fixed rules: a darker video is brightened, a very bright one is darkened a little, a flat one gets more contrast and a harsh one less.

Q18: What are colour profiles?

A18: A profile keeps the current brightness, contrast, saturation, look and grading under a name in this browser, to apply to other videos. Save profiles file and Open profiles file move them between browsers.

5. Text, subtitles and markers

Q19: How do I add a title or caption?

A19: In Text and subtitles, type the text, pick its colour and size and press Add text. It appears in the middle of the picture for the whole video; drag it on the picture, or type where its middle goes in percent. Text keeps its size relative to the picture, so it looks the same in the saved video.

Q20: How do subtitles work?

A20: Move the playhead to where a line is said and press Add a subtitle at the playhead. Type the line and how many seconds it shows. Subtitles show at the bottom of the picture in the preview and in the saved video, and Save subtitles writes an SRT file that players and video sites can read, with the times of the saved video (after your cuts, at your speed).

Q21: What are markers?

A21: Notes on the timeline. Press M to add one at the playhead with a label and a colour; Shift+M and Shift+N go to the previous and next marker, and clicking a marker on the timeline goes there. Markers are not drawn in the saved video.

6. Effects and sound

Q22: How do fades and transitions work?

A22: Fade in and fade out bring the saved video in from black and out to black over the seconds you set. A transition plays as a clip begins: Fade through black, Dissolve, Wipe or Slide from the last picture of the clip before it (from black for the first clip). Put the playhead on a clip and press Apply.

Q23: How do speed and speed ramps work?

A23: Speed plays and saves the whole video from a quarter of its speed to four times faster. A speed ramp changes the speed smoothly from one value to another over a few seconds, starting at the playhead, then goes back to the speed you set. The saved video is shorter or longer to match, and imported music stays at its own speed.

Q24: How do I add music?

A24: In Sound, press Import sound and choose a music or voice file of up to 200 MB. It plays from the start of the saved video with its own volume and mute, together with the video's own sound. Up to five sound files.

Q25: What does Normalize do?

A25: It makes the video's own sound louder or quieter so its loudest moment reaches 1 dB below the top of the scale, the headroom the EBU R 128 recommendation keeps for peaks, and at most ten times louder. It does not change how loud the parts are compared with each other.

Q26: How do video layers and green screen work?

A26: Add video layer draws another video over yours from the start of the saved video, with its own opacity, size and place, without its sound. Green screen makes a colour see-through in your layers: film a person in front of a green or blue cloth, add that video as a layer, pick the colour and turn green screen on, and your main video shows behind them.

7. Saving

Q27: How long does saving take?

A27: About as long as the saved video: saving plays your edited video from start to end and records the preview as it plays. A 5-minute video takes about 5 minutes. The Save window shows the length before you start and the time left while it records.

Q28: Why must I keep the tab open?

A28: Browsers stop drawing in a hidden tab. If you switch away, the recording pauses with the video and carries on when you come back, so the file has no gaps, but it only finishes while the tab is open and in front.

Q29: MP4 or WebM?

A29: MP4 is made where the browser can record it (recent Chrome, Edge and Safari); some browsers record MP4 with Opus sound, which a few older players cannot play, and the Save window says so. Where MP4 cannot be recorded, the file is saved as WebM, which plays in current browsers and most video players. The file name always ends in the format the file really has.

Q30: Which sizes can I save?

A30: 720p, 1080p and 4K count the shorter side (a 1080p widescreen video is 1920 x 1080, a 1080p upright one is 1080 x 1920), or As the video is. The saved video is at most 3840 x 2160 and at most 30 minutes long. The presets set a common shape and size for that one save, such as 9:16 at 1080 x 1920 (the shape of your edit stays as it is); they are examples, not any site's rules.

Q31: What are project files?

A31: Save project writes your edit (not the video) to a small .veproj file. Open project puts it back on the same video, now or later on another computer. Project files from the earlier WebEdit Pro open too. Video layers and imported sound are not in project files; add them again.

8. Help

Q32: Can I use it with the keyboard?

A32: Yes. Tab reaches every button and box. While you use the tool: Space plays or pauses, the arrow keys step one frame, minus, plus and 0 change the speed, C and T pick the Cut and Trim tools, S splits, I and Shift+E start and end a selection, Delete deletes, M adds a marker, Shift+M and Shift+N jump between markers, Ctrl+Z, Ctrl+Y and Ctrl+S undo, redo and save the project, and ? opens the help. The keys never take your browser's own shortcuts.

Q33: How is WebEdit Pro different from the site's other video tools?

A33: GIF Forge turns a part of a video, a screen recording or pictures into a short GIF or clip. The media converter changes a file from one format to another. WebEdit Pro is a video editor: cut and arrange the parts you keep, change the colour, add text, subtitles, music, fades, transitions and video layers, and save the result as a new video.

Still have a question?

The help page walks through every part of WebEdit Pro. For anything else, use the contact form.