You click on a video and nothing happens. Or it opens, freezes after two seconds and shows a black screen. It's more common than most people think. Your phone may have died in the middle of recording, a transfer might have stopped halfway, or your SD card threw an error. None of that means the video is lost. In most cases, all you need is the right online repair service, and it'll sort the file out for you.

Every tool below runs in your web browser, so there's nothing to download or install. You upload the damaged video, the service does the repair work, and you download the fixed file once it's ready. Below, I go through five of these services one by one, with simple steps for each and an honest look at what's good and what isn't.

Quick Comparison Table

1. Stellar Online Video Repair

Stellar has spent around three decades in data recovery, and its online video repair service brings that experience to the browser. You'll need to create an account, and your first video is repaired for free. It handles a wide range of formats, including MP4, MOV, AVI, MKV, WMV, FLV and WEBM, plus HEVC video from newer phones. The part I like most is the preview. You see how your repaired video looks before you pay anything, so there's no guesswork. The free plan works with files up to 100MB. If your video broke because of a power cut, a failed transfer or a faulty SD card, Stellar is a good place to start.

How to repair a corrupt video with Stellar

1. Go to repair.stellarinfo.com in your browser.


2. Click the upload button and pick the damaged video from your computer or phone.


3. Upload a sample video as well. This should be a healthy file recorded on the same device (same phone or camera, with similar settings) as the damaged one. The tool uses it as a reference to rebuild the broken video.


4. Click Repair and wait. It usually takes just a few minutes for the file to be fixed.


5. Watch the preview that appears in your browser.


6. If everything looks right, download the video and save it.

What's good about Stellar

• Your first video repair costs nothing.


• Supports almost every common video format.


• Uploaded videos are deleted from its servers automatically after 24 hours.


• You can check the result before you pay.

What's not so great

• The 100MB free limit runs out quickly with long or high-resolution videos.


• You have to pay to download the full-quality file.


• Even on the paid plan, each file can be at most 5GB.

2. 4DDiG Online Video Repair

4DDiG comes from Tenorshare, and its online video repair is meant for people dealing with broken phone or camera clips. It's about as simple as it gets. There's no account to create, no sign-up form, nothing to install and no card details to enter, just an upload area and a repair button. Once you upload, it checks the file, works out which part of its structure is damaged and rebuilds it for you, usually in a couple of minutes. It does its best work on shorter clips and smaller files.

How to repair a corrupt video with 4DDiG

1. Open 4ddig.tenorshare.com.


2. Upload the damaged video.


3. Click the repair button.


4. Wait a moment while it scans the file and rebuilds the missing parts.


5. Preview the repaired video on the same page, and if you're happy with it, save it wherever you like.

What's good about 4DDiG

• Basic repairs are free.


• No installation and no sign-up.


• There's a desktop version if you ever need more power.

What's not so great

• Better for small files than large 4K recordings.


• Supports fewer formats than the desktop app.


• You can only repair three files a day.

3. Repairit Online Video Repair

Repairit Online Video Repair is made by Wondershare, a well-known name in AI-powered creative software. Its interface is very plain, and picking and uploading a file takes almost no effort. You won't find a settings menu or any technical terms, only an upload box and a progress bar. It's clearly built for beginners, so it's a good fit if you just want your video fixed without learning anything new. The free version tops out at about 50MB, which is fine for short clips but tight for longer 4K footage.

How to repair a corrupt video with Repairit

1. Open Wondershare's online video repair page.


2. Drag the corrupt video into the upload box, or click Add to find it on your device.


3. Let it check the file and fix what it can on its own.


4. Watch the preview when it's done.


5. Save the repaired video to your device.

What's good about Repairit

• Free, and it runs right in the browser.


• Works on phones, Macs and PCs alike.


• Lets you see the fixed video before saving it.

What's not so great

• 50MB doesn't go far with today's phone videos.


• Larger files mean moving to the paid desktop software.


• Results can be hit or miss with unusual or badly damaged files.

4. Fix.Video

Fix.Video works differently from the rest of this list. Rather than guessing what your broken file should look like, it asks for a second, working video as a reference. Ideally, that reference was recorded on the same camera with the same settings. It's a bit more effort at the start, but it tends to give clearly better results, especially in tough cases like dashcam footage from a crash or video from a drone that fell.

How to repair a corrupt video with Fix.Video

1. Go to fix.video and upload the corrupted video.


2. If you have one, also upload a working video from the same camera or phone, with a similar resolution and frame rate.


3. Submit both files and let the service process them.


4. Use the Small Preview option to check how the repaired video looks.


5. Pay, then download the video.

What's good about Fix.Video

• Fully automatic once your files are uploaded.


• Handles footage from most well-known camera brands.

What's not so great

• You have to pay to get the repaired video.


• Only one video can be repaired at a time.


• Every repair needs a reference file.

5. EaseUS Online Video Repair

Many people already know EaseUS from its data recovery software, and its online video repair tool carries that reputation into the browser. It runs an algorithm over your file to find exactly where the structure is broken, such as a damaged header, missing metadata or a corrupted index, and fills those gaps without touching the footage itself. It supports a good mix of formats, including MP4, MOV, AVI, MKV, M2TS and 3GP, which covers most everyday cameras and phones.

It does best with minor to moderate damage, like a file that stopped mid-transfer or an SD card that wasn't ejected properly. Badly damaged videos are harder for it, and if the online version can't help, you'll probably need their desktop software. As with most tools here, the preview is free and the full download is paid.

How to repair a corrupt video with EaseUS

1. Go to easeus.com and open its online video repair tool.


2. Upload your MP4, MOV, AVI, MKV, M2TS or 3GP file.


3. Start the repair and let the algorithm work.


4. Preview the result in your browser.


5. Look in your email for the download link or code.


6. If you want the full, unlocked video, pay and then download it.

What's good about EaseUS

• Finds and fixes common problems on its own.


• Supports a good range of everyday video formats.


• Easy enough to use with no previous experience.

What's not so great

• Struggles with badly damaged files.


• The full download isn't free.


• Large files can take a while.

Frequently Asked Questions

Is it safe to upload my video to an online repair site?

Generally, yes, if you stick to a well-known service. Most of these tools encrypt the file during upload, repair it on a private server and delete it automatically afterwards. If the video is sensitive, though, a desktop video repair tool is the safer choice, since the file never leaves your computer.

Can I repair a video for free?

Yes, you can repair at least one file without paying. The usual catch is a size limit, which on most free plans falls somewhere between 50MB and 100MB.

Does repairing a video reduce its quality?

No. A proper repair tool such as Stellar or Fix.Video only fixes the file's structure. It doesn't re-encode or compress the footage, so the resolution, frame rate and bitrate should stay the same as before.

What is a reference or sample video file?

It's a video that plays fine, ideally shot on the same camera with the same settings as the damaged one. Some tools use it to learn how your device encodes video, which helps them rebuild the broken file more accurately.

Can video repair tools fix a video with no sound?

Yes. Missing audio is one of the most common problems these services are made for, along with black screens, choppy playback and audio that's out of sync.

Can I repair a corrupted video on my phone without installing an app?

Yes. Every tool on this list works completely in the web browser on your phone or computer, so there's nothing to download or install.

What if the online tool can't fix my video?

That can happen, especially with severe damage or unusual formats. When it does, most companies suggest their paid desktop software, which has more processing power and deeper repair options than a browser tool.