Creating an AI video with Synthesia can save hours of editing work, but things become frustrating when the export process suddenly fails. You may see a rendering error, a video stuck on processing, or a download that never starts. Sometimes, Synthesia appears to finish generating your video, but the final MP4 file is still unavailable.
The Synthesia AI Video Export Failed problem can happen for several reasons. Browser cache issues, unstable internet connections, temporary server delays, complicated video projects, and account restrictions can all interfere with the process.
The good news is that most export problems do not mean your entire project is lost. We can usually identify the cause by checking the generation status, browser, network, and video settings before trying another export.
In this guide, we will explain seven practical ways to fix Synthesia rendering errors, resolve stuck video processing, and troubleshoot download failures. We will also cover situations where the problem comes from Synthesia itself rather than your computer.
Let’s start with the most common causes and work through the solutions step by step.
What Causes the Synthesia AI Video Export Failed Error?
Before applying fixes, we should understand why Synthesia sometimes fails to generate or export a video. The platform processes several elements, including scripts, AI avatars, voiceovers, scenes, and visual content. Problems with any of these elements can affect the final result.
Here are some common reasons behind the Synthesia AI Video Export Failed issue:
- Temporary server problems: Synthesia may experience high demand or temporary processing delays.
- Browser cache conflicts: Old or corrupted browser data can interfere with the editor and video generation process.
- Unstable internet: A weak connection may interrupt communication between your browser and Synthesia.
- Complex video projects: Long videos, multiple scenes, and heavy visual elements can take longer to process.
- Account restrictions: Your subscription, available minutes, or permissions may prevent certain actions.
- Incomplete video generation: A project that has not finished rendering cannot be downloaded as a completed MP4.
- Unsupported export conditions: Interactive videos may not support standard MP4 downloads.
Understanding these causes helps us avoid unnecessary changes. For example, clearing browser cache will not fix an account that does not include video downloads. Similarly, changing your internet connection will not resolve a platform-wide rendering outage.
We should identify the exact stage where the problem occurs before moving to the next solution.
1. Check Synthesia Server Status Before Trying Other Fixes
One of the first things we should check is whether Synthesia is experiencing a platform issue. Sometimes, the Synthesia AI Video Export Failed error has nothing to do with your browser, computer, or video project.
When Synthesia experiences a temporary service disruption, video generation may become slower or stop working. You might notice that your project remains on the rendering screen, the progress indicator does not move, or multiple export attempts fail.
How to Check Synthesia Server Status
Follow these steps:
- Open the official Synthesia Status Page.
- Review the current status of video generation.
- Check whether the editor or video-sharing services are experiencing problems.
- Look for recently reported incidents or scheduled maintenance.
- If an incident is active, wait until Synthesia resolves it before generating another video.
If the video generation service is experiencing problems, repeatedly clicking Generate will not make the process faster. It may also create unnecessary processing requests.
We recommend waiting for the service to return to normal before trying again. Keep your original project unchanged so you can continue working when the platform becomes available.
When Should You Try Exporting Again?
If the status page reports that all services are operational, return to your project and check its generation status. If the problem continues, move to the next troubleshooting method.
If the status page reports an incident, give the platform time to recover. A failed export during a service disruption does not automatically mean your video project is damaged.
2. Refresh Your Browser and Clear Cached Data
Browser-related problems are another common reason behind the Synthesia AI Video Export Failed error. Your browser stores temporary files, cookies, cached resources, and website settings to help pages load faster.
However, outdated or corrupted data can sometimes interfere with Synthesia’s editor. This may cause buttons to stop responding, previews to load incorrectly, or video generation to fail.
We recommend starting with a hard refresh before deleting all browser data.
Perform a Hard Refresh
If you use Google Chrome on Windows, follow these steps:
- Open your Synthesia video project.
- Press Ctrl + Shift + R on your keyboard.
- Wait for the editor to reload completely.
- Open the affected project again.
- Try generating a preview or exporting the video.
Mac users can press Command + Shift + R to perform a hard refresh.
Clear Your Browser Cache
If refreshing does not resolve the problem, clear your browser cache.
In Google Chrome:
- Select the three-dot menu in the upper-right corner.
- Open Settings.
- Select Privacy and Security.
- Choose Delete Browsing Data.
- Select Cached images and files.
- Choose the appropriate time range.
- Select Delete Data.
- Restart Chrome and sign in to Synthesia again.
You can also try Synthesia’s dedicated browser cleanup tool at Synthesia Browser Reset.
Before using this tool, close all other Synthesia tabs. Then select Reset All and wait for the process to finish. This resets stored browser settings without deleting your Synthesia account, videos, or workspace data.
Test Synthesia in Another Browser
If the export still fails, open Synthesia in the latest version of Microsoft Edge or Google Chrome.
You can also test the project in a private or incognito window. This helps determine whether an extension or existing browser session is causing the issue.
If the video works in another browser, the original browser is likely responsible for the problem.
3. Fix Your Internet Connection and Disable VPN Conflicts
A stable internet connection is important when working with an online AI video generator. Synthesia needs to communicate with its servers while loading projects, processing scenes, generating videos, and preparing downloads.
If your connection repeatedly drops, the editor may become unresponsive or display an error during the export process.
The Synthesia AI Video Export Failed issue can also appear when your internet connection is technically active but too unstable for continuous online work.
Test Your Internet Connection
Start by checking whether other websites and online services load normally.
Then follow these steps:
- Disconnect your computer from Wi-Fi.
- Reconnect to your network.
- Restart your router if the connection remains unstable.
- Close applications that use significant bandwidth.
- Open Synthesia again.
- Try generating your video.
If possible, connect your computer directly to the router using an Ethernet cable. A wired connection can provide more consistent network performance than a weak wireless signal.
Temporarily Disable Your VPN
VPN services and network filtering tools can sometimes interfere with website connections.
If you are using a VPN, temporarily disconnect it and reload Synthesia. You can also test the platform using another trusted network.
However, avoid disabling essential security protections or changing company network settings without permission.
Check Your Firewall and Browser Extensions
Privacy extensions, aggressive ad blockers, and security software may interfere with certain website functions.
To identify the cause:
- Open Synthesia in an incognito window.
- Temporarily disable nonessential browser extensions.
- Check whether your firewall is blocking Synthesia.
- Ask your network administrator about restrictions if you use a managed workplace connection.
If the export works after changing networks or testing without extensions, you have a useful clue about the source of the problem.
Remember that changing your connection will not fix a server-side rendering issue. If Synthesia itself is experiencing a disruption, you will need to wait for the platform to recover.
4. Simplify Your Video Project and Check Its Scenes
Sometimes, the problem is not your browser or internet connection. The video project itself may contain elements that need additional processing.
Long scripts, multiple scenes, extensive visual content, and complicated layouts can make generation take longer. A project that contains many elements may also be more difficult to troubleshoot when one particular scene causes an error.
If the Synthesia AI Video Export Failed message appears repeatedly on the same project, checking its structure is a useful next step.
Break a Large Video Into Smaller Sections
If you are working on a long training presentation or business video, consider dividing it into smaller sections.
For example, instead of creating one video with 30 scenes, divide the content into three separate videos with 10 scenes each.
This approach can make it easier to identify processing problems and manage individual sections.
It is also useful when you need to update one part of a presentation without rebuilding the entire project.
Check Individual Scenes
Open your project in the Synthesia editor and review the scenes one by one.
Pay attention to:
- Scenes containing large visual assets.
- Slides with multiple animations.
- Unusually long narration sections.
- Videos or media that do not load correctly.
- Avatar and voice settings that differ from the rest of the project.
If you find a scene that behaves differently, temporarily simplify it and generate a test version.
For example, remove an unnecessary visual element or replace a complicated layout with a simpler one. Then check whether the project generates successfully.
Review Your Script and Voiceover
A complicated scene is not always the cause of a failed export. Audio and script settings should also be reviewed.
Check whether the narration matches the intended scene, whether the selected voice is available, and whether any audio element appears to be missing.
Do not delete large sections of your original project immediately. Make a duplicate before testing major changes so you can restore your previous version if necessary.
If a simplified version generates successfully, gradually restore the removed elements. This can help us identify which part of the project is causing the rendering problem.
5. Wait for Video Processing to Finish and Avoid Repeated Generation
A video that appears stuck is not necessarily a failed video.
Synthesia processes generated videos through several stages, including Moderating, Queued, Preparing, Rendering, Assembling, and Finalizing. Some stages may take longer than others, especially when the project contains more content or the platform is busy.
This is why we should not assume that every delay means the Synthesia AI Video Export Failed.
Understand the Video Generation Stages
Here is what the different stages generally mean:
| Processing stage | What happens |
|---|---|
| Moderating | The content goes through Synthesia’s moderation process. |
| Queued | Your video is waiting for processing resources. |
| Preparing | The platform prepares the project for rendering. |
| Rendering | Video scenes and visual elements are processed. |
| Assembling | Processed elements are combined into the video. |
| Finalizing | The generated video is completed and prepared for use. |
If your video remains in one stage for a while, check whether the platform is still processing it.
Avoid Clicking Generate Multiple Times
One mistake users make is repeatedly clicking the Generate button because the first attempt seems slow.
This is not a reliable solution. Synthesia advises users not to generate the same video repeatedly while it is awaiting moderation because doing so can increase waiting times.
Instead, follow this approach:
- Check the current processing status.
- Wait for the existing generation request to finish.
- Refresh the project only if the editor appears unresponsive.
- Check whether a completed version is available.
- Start another generation only when the previous attempt has clearly failed.
Synthesia also supports generating up to 10 videos at once. Additional requests may remain queued until processing capacity becomes available.
What If Your Video Is Stuck in Moderation?
If the project is undergoing manual moderation, waiting may be necessary.
According to Synthesia’s guidance, users should contact its support team if a video has remained under manual review for more than 24 hours. You can reach the team at support@synthesia.io.
Do not keep changing the project or submitting duplicate generation requests while waiting for a moderation decision.
6. Check Your Subscription, Credits, and Download Permissions
Not every export problem comes from rendering. Sometimes, the video has been generated successfully, but your account does not support the download option you are trying to use.
This distinction is important because the Synthesia AI Video Export Failed error and a restricted download option are two different problems.
A completed video may be available for online playback even when downloading it as an MP4 is not permitted under your current plan.
Check Whether Your Plan Supports Downloads
Synthesia’s documentation states that video downloads are available on Starter, Pro, and Enterprise plans. Basic and trial users cannot download videos.
To check your download eligibility:
- Sign in to your Synthesia account.
- Open the completed video.
- Select the three-dot menu in the upper-right corner.
- Look for the Download option.
- Review any message about restricted access or plan limitations.
If the download option is unavailable, review your subscription before troubleshooting your browser again.
Check Your Available Minutes and Credits
Your account balance may also affect video generation.
If Synthesia displays an insufficient credits or minutes message, review your current usage and subscription details.
Do not purchase additional credits immediately without checking the message and your billing information. First, confirm whether the problem is related to available minutes, permissions, or an unrelated rendering error.
Check Whether You Have the Required Permissions
If you are working in a team workspace, your account permissions may affect what you can generate or download.
Ask the workspace administrator to confirm that your account has the necessary access.
Also check whether the selected avatar or other project features require permissions that your account does not have.
These checks can help prevent unnecessary changes to a project that is otherwise working correctly.
7. Fix MP4 Download Problems and Contact Synthesia Support
The final troubleshooting method focuses on videos that have already finished generating but still cannot be downloaded.
This situation is different from a rendering failure. If the video is complete and plays correctly inside Synthesia, we should investigate the download process rather than generating the entire project again.
Follow the Correct Download Process
According to Synthesia’s download instructions, you can download an eligible completed video using these steps:
- Open your generated video.
- Select the three-dot menu in the upper-right corner.
- Choose Download.
- Select the MP4 option.
- Wait for the browser to complete the download.
- Check your computer’s Downloads folder.
Synthesia also supports audio and caption-related download formats, depending on the available options.
Check Whether Your Video Contains Interactive Elements
One important limitation is that Synthesia does not support downloading interactive videos as standard MP4 files.
Interactive elements can include:
- Buttons.
- Branching logic.
- Interactive scene navigation.
- Other elements that require user input.
These features depend on interaction during playback, which a standard MP4 file cannot preserve.
If your project contains interactive elements, Synthesia recommends using its supported sharing or SCORM options instead. You can also duplicate the project, remove interactive elements, and generate a separate downloadable version.
Check Your Browser’s Download Settings
If the Download option works but no file appears, check your browser’s download settings.
Make sure that:
- The browser is not blocking the download.
- Your computer has sufficient storage space.
- The Downloads folder is accessible.
- Security software is not automatically blocking the file.
- You are not using an outdated browser.
You can also test the download using another supported browser.
Contact Synthesia Support if Nothing Works
If you have tried all seven methods and the Synthesia AI Video Export Failed problem continues, contact Synthesia Support.
Provide useful information so the support team can investigate the issue more effectively.
Include:
- Your video project name.
- A description of the error message.
- The stage where generation stops.
- Your browser and operating system versions.
- The approximate time when the issue occurred.
- Screenshots of the error, if available.
You can also explain which troubleshooting steps you have already completed.
Avoid sharing passwords, private account credentials, or sensitive project information in a public support discussion.
Official help resources are available through the Synthesia Help Center.
FAQ
Why does Synthesia video rendering take so long?
The Synthesia AI Video Export Failed problem can occur when video rendering takes longer than expected. Long projects, high processing demand, moderation checks, and temporary server delays can slow down Synthesia video generation. Check the current rendering stage and wait for processing to finish before trying another export.
Why is my Synthesia video stuck at 99%?
If your Synthesia video is stuck at 99%, the platform may still be completing final processing or assembling the video. This can sometimes lead to a Synthesia AI Video Export Failed error. Check Synthesia server status, refresh your browser, and allow the existing generation request to finish before submitting another export.
How do I fix Synthesia AI Video Export Failed on Chrome?
To fix Synthesia AI Video Export Failed on Chrome, update Google Chrome, perform a hard refresh, clear cached files, and temporarily disable unnecessary browser extensions. If the Synthesia video export error continues, test your project in Microsoft Edge or an incognito window.
Can I download a Synthesia video without an MP4 export option?
If your Synthesia MP4 export option is missing, your subscription may not include video downloads, or your project may contain interactive elements. Check your account permissions and subscription settings. These restrictions can cause confusion when troubleshooting Synthesia AI Video Export Failed problems. Interactive videos can be shared through supported alternatives but cannot be downloaded as standard MP4 files.
Does clearing browser cache delete my Synthesia projects?
No. Clearing ordinary browser cache does not delete your Synthesia projects stored in your account. It can help resolve browser-related Synthesia AI Video Export Failed errors caused by outdated or corrupted cached files. However, avoid selecting options that delete saved passwords or other browser data you want to keep.
What should I do if Synthesia keeps failing to generate videos?
If Synthesia keeps failing to generate videos, check the platform status, review your available minutes, test your browser and internet connection, and simplify the affected project. These steps can help resolve common Synthesia AI Video Export Failed issues. If the Synthesia video rendering error continues, contact Synthesia Support with screenshots and relevant error details.
Why does Synthesia AI video export fail even after rendering completes?
The Synthesia AI Video Export Failed error can still appear after rendering finishes if the MP4 download process encounters a browser issue, account restriction, or temporary server problem. Check whether your video plays correctly in Synthesia, verify your download permissions, and try downloading it in another browser. These steps can help resolve Synthesia video export failures without generating the entire project again.
Final Thoughts
The Synthesia AI Video Export Failed error can interrupt your workflow, but it does not always mean your project is damaged or permanently lost. Most Synthesia export problems can be investigated by checking your browser, internet connection, project settings, and video processing status.
We recommend starting with the simplest solutions to fix Synthesia AI Video Export Failed problems. Check Synthesia’s server status, refresh your browser, clear cached files, test your internet connection, and review the affected scenes. If your Synthesia video export remains stuck, check its processing stage and avoid repeatedly generating the same project.
You should also verify your subscription, available minutes, and download permissions before assuming that a Synthesia AI video rendering error is responsible for the problem.
By following these seven methods, we can identify common causes of Synthesia AI Video Export Failed errors, troubleshoot rendering problems, resolve stuck exports, and fix MP4 download issues. These solutions can help us get Synthesia AI-generated videos ready for use without unnecessarily rebuilding an entire project.
For more AI video troubleshooting guides, Synthesia export solutions, and practical technology tutorials, visit techwraz.com.