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video-generator

Synthesia

AI avatar videos from scripts that generate cleanly, but the tested workflow stayed landscape and export-gated.

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AI avatar video3 scripts testedLandscape outputDownload gated
TL;DR — our verdictUpdated July 2026 · 7 test artifacts

Reliable script-to-avatar generation, but not a ready-to-export UGC ad workflow in this test

Where it wins
  • You need a straightforward script-in, avatar-out workflow for polished promo videos.
  • You are comfortable reviewing output inside the web app before export.
  • You can work with a workflow that may gate download or translation behind an upgrade.
Main limitation
  • You need guaranteed vertical 9:16 short-form ads.

Our take

Synthesia consistently turned the three supplied product scripts into polished AI-avatar videos with clear voice delivery and consistent lip-sync on a paid credits plan. In the tested workflow, though, the outputs stayed landscape rather than vertical and final download was blocked behind an upgrade, so it was more usable for in-browser review and corporate-style promo work than for immediate short-form ad export.

Download video: Demo video
Screen recording of the tested Synthesia workflow, including script input, avatar selection, generation, and the download/translate menus.

In-Depth Review

Our detailed analysis of Synthesia — features, performance, and real-world testing.

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AI Demos Team
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Verified Review

Feature-by-Feature Breakdown

Script-to-Avatar Video Generation
Worked across all three scripts, but the tested output format was not vertical UGC-ready.
▾
Test Summary
Feature tested: Script-to-Avatar Video Generation
Result: Partial — Worked across all three scripts, but the tested output format was not vertical UGC-ready.

Feature tested: Script-to-Avatar Video Generation

Result: Partial

Verdict: Worked across all three scripts, but the tested output format was not vertical UGC-ready.

Expected behavior: Synthesia took supplied product scripts and produced finished AI-avatar videos for the tested FutureSmart AI, Nike Pegasus 41, and Duolingo inputs, including spoken narration and successful completion inside the platform.

Test case: Text prompt → Video file

Input type: Text prompt

Input used: Input artifact (Text prompt): Input

Observed output: Output artifact (Video file): Generated successfully with clear presenter delivery, natural voice, and consistent lip-sync. The test also noted about 32 credits for a 16–17 second video, with landscape output and upgrade-gated download. — Synthesia-FutureSmart AI-output mp4.mp4

Input artifact: Input artifact (Text prompt): Input

Output artifact: Output artifact (Video file): Generated successfully with clear presenter delivery, natural voice, and consistent lip-sync. The test also noted about 32 credits for a 16–17 second video, with landscape output and upgrade-gated download. — Synthesia-FutureSmart AI-output mp4.mp4

What changed: Text prompt transformed into Video file

Test case: Text prompt → Video file

Input type: Text prompt

Input used: Input artifact (Text prompt): Input

Observed output: Output artifact (Video file): Generated successfully with professional, consistent avatar delivery, strong voice clarity, and accurate lip-sync. The tested workflow still produced landscape video and required an upgrade to download. — Synthesia-Nike Pegasus 41-output mp4.mp4

Input artifact: Input artifact (Text prompt): Input

Output artifact: Output artifact (Video file): Generated successfully with professional, consistent avatar delivery, strong voice clarity, and accurate lip-sync. The tested workflow still produced landscape video and required an upgrade to download. — Synthesia-Nike Pegasus 41-output mp4.mp4

What changed: Text prompt transformed into Video file

Test case: Text prompt → Video file

Input type: Text prompt

Input used: Input artifact (Text prompt): Input

Observed output: Output artifact (Video file): Generated smoothly with clear, well-paced voice delivery and maintained lip-sync. The output remained landscape, and downloading was not available without upgrading. — Synthesia-Duolingo-output mp4.mp4

Input artifact: Input artifact (Text prompt): Input

Output artifact: Output artifact (Video file): Generated smoothly with clear, well-paced voice delivery and maintained lip-sync. The output remained landscape, and downloading was not available without upgrading. — Synthesia-Duolingo-output mp4.mp4

What changed: Text prompt transformed into Video file

Why it matters / Conclusion: Reliable generation across three normal promo scripts, but the tested outputs were landscape 16–17 second videos rather than short-form vertical ads.

Synthesia took supplied product scripts and produced finished AI-avatar videos for the tested FutureSmart AI, Nike Pegasus 41, and Duolingo inputs, including spoken narration and successful completion inside the platform.

INPUT
FutureSmart AI script: "I've been using FutureSmart AI to discover and compare AI tools in one place. It helps me find the right tool faster with real use cases, rankings, and detailed comparisons. If you regularly use AI tools for work, it's definitely worth checking out."
↓
video
Video thumbnail
Download video: Synthesia-FutureSmart AI-output mp4.mp4
Generated successfully with clear presenter delivery, natural voice, and consistent lip-sync. The test also noted about 32 credits for a 16–17 second video, with landscape output and upgrade-gated download.
INPUT
Nike Pegasus 41 script: "I've been wearing the Nike Pegasus 41 for my daily runs, and they've been incredibly comfortable from day one. They're lightweight, well-cushioned, and great for everyday training. If you're looking for dependable running shoes, they're definitely worth considering."
↓
video
Video thumbnail
Download video: Synthesia-Nike Pegasus 41-output mp4.mp4
Generated successfully with professional, consistent avatar delivery, strong voice clarity, and accurate lip-sync. The tested workflow still produced landscape video and required an upgrade to download.
INPUT
Duolingo script: "I've been using Duolingo for a few minutes every day, and it's made language learning simple and fun. The short lessons are easy to follow, and the daily practice keeps me motivated. If you're planning to learn a new language, give Duolingo a try."
↓
video
Video thumbnail
Download video: Synthesia-Duolingo-output mp4.mp4
Generated smoothly with clear, well-paced voice delivery and maintained lip-sync. The output remained landscape, and downloading was not available without upgrading.
Bottom Line
Reliable generation across three normal promo scripts, but the tested outputs were landscape 16–17 second videos rather than short-form vertical ads.
Avatar Library and Presenter Selection
Presenter selection was available through a browsable avatar library.
▾
Test Summary
Feature tested: Avatar Library and Presenter Selection
Result: Passed — Presenter selection was available through a browsable avatar library.

Feature tested: Avatar Library and Presenter Selection

Result: Passed

Verdict: Presenter selection was available through a browsable avatar library.

Expected behavior: The avatar picker provided a searchable presenter library with filters like All Avatars, My Avatars, Shared with me, Recent, Brand kit, and Custom Avatars, along with presenter thumbnails for choosing a presenter.

Test case: Text prompt → Image

Input type: Text prompt

Input used: Input artifact (Text prompt): Input

Observed output: Output artifact (Image): The avatar picker displayed multiple selectable presenters and categories, including All Avatars, My Avatars, Shared with me, Recent, Brand kit, and Custom Avatars. — synthesia-avatar-library.png

Input artifact: Input artifact (Text prompt): Input

Output artifact: Output artifact (Image): The avatar picker displayed multiple selectable presenters and categories, including All Avatars, My Avatars, Shared with me, Recent, Brand kit, and Custom Avatars. — synthesia-avatar-library.png

What changed: Text prompt transformed into Image

Why it matters / Conclusion: The presenter library is easy to browse, but this report did not verify separate voice-library breadth or an avatar swap inside a finished ad.

The avatar picker provided a searchable presenter library with filters like All Avatars, My Avatars, Shared with me, Recent, Brand kit, and Custom Avatars, along with presenter thumbnails for choosing a presenter.

INPUT
Open the avatar picker to review available presenters before generating the video.
↓
image
Output artifact for "Avatar Library and Presenter Selection" test: The avatar picker displayed multiple selectable presenters and categories, including All Avatars, My Avatars, Shared with me, Recent, Brand kit, and Custom Avatars., synthesia-avatar-library.png
The avatar picker displayed multiple selectable presenters and categories, including All Avatars, My Avatars, Shared with me, Recent, Brand kit, and Custom Avatars.
Bottom Line
The presenter library is easy to browse, but this report did not verify separate voice-library breadth or an avatar swap inside a finished ad.
In-Editor Preview and Playback
Previewing worked inside the workspace.
▾
Test Summary
Feature tested: In-Editor Preview and Playback
Result: Passed — Previewing worked inside the workspace.

Feature tested: In-Editor Preview and Playback

Result: Passed

Verdict: Previewing worked inside the workspace.

Expected behavior: Synthesia let the tester review generated videos inside the workspace before export, so the result could be inspected without leaving the editor.

Test case: Text prompt → Image

Input type: Text prompt

Input used: Input artifact (Text prompt): Input

Observed output: Output artifact (Image): Output — synthesia-script-input.png

Input artifact: Input artifact (Text prompt): Input

Output artifact: Output artifact (Image): Output — synthesia-script-input.png

What changed: Text prompt transformed into Image

Why it matters / Conclusion: Previewing is available and worked as expected, but the report did not test deeper edits or refinement beyond review.

Synthesia let the tester review generated videos inside the workspace before export, so the result could be inspected without leaving the editor.

INPUT
Review the generated video inside Synthesia's in-editor preview.
↓
image
Output artifact for "In-Editor Preview and Playback" test: Output, synthesia-script-input.png
Bottom Line
Previewing is available and worked as expected, but the report did not test deeper edits or refinement beyond review.
Export and Translation Controls
Export and translation actions were visible, but gated on the tested account.
▾
Test Summary
Feature tested: Export and Translation Controls
Result: Partial — Export and translation actions were visible, but gated on the tested account.

Feature tested: Export and Translation Controls

Result: Partial

Verdict: Export and translation actions were visible, but gated on the tested account.

Expected behavior: The version menu exposed download options for MP4 and caption files plus a Translate action, though the tested account showed upgrade gating for download and translation.

Test case: Text prompt → Image

Input type: Text prompt

Input used: Input artifact (Text prompt): Input

Observed output: Output artifact (Image): The version menu showed export choices for video and captions files, but downloading the generated video required an upgraded plan. — synthesia-download-restriction.png

Input artifact: Input artifact (Text prompt): Input

Output artifact: Output artifact (Image): The version menu showed export choices for video and captions files, but downloading the generated video required an upgraded plan. — synthesia-download-restriction.png

What changed: Text prompt transformed into Image

Test case: Text prompt → Image

Input type: Text prompt

Input used: Input artifact (Text prompt): Input

Observed output: Output artifact (Image): The video workspace exposed Translate in the version menu, but the tested workflow indicated that the action required an upgrade. — synthesia-translate-option.png

Input artifact: Input artifact (Text prompt): Input

Output artifact: Output artifact (Image): The video workspace exposed Translate in the version menu, but the tested workflow indicated that the action required an upgrade. — synthesia-translate-option.png

What changed: Text prompt transformed into Image

Why it matters / Conclusion: The product surfaces export and language workflows, but the tested plan could not complete them.

The version menu exposed download options for MP4 and caption files plus a Translate action, though the tested account showed upgrade gating for download and translation.

INPUT
Open the Download submenu on a generated video.
↓
image
Output artifact for "Export and Translation Controls" test: The version menu showed export choices for video and captions files, but downloading the generated video required an upgraded plan., synthesia-download-restriction.png
The version menu showed export choices for video and captions files, but downloading the generated video required an upgraded plan.
INPUT
Open the Translate option from the same generated-video version menu.
↓
image
Output artifact for "Export and Translation Controls" test: The video workspace exposed Translate in the version menu, but the tested workflow indicated that the action required an upgrade., synthesia-translate-option.png
The video workspace exposed Translate in the version menu, but the tested workflow indicated that the action required an upgrade.
Bottom Line
The product surfaces export and language workflows, but the tested plan could not complete them.
✓ Use This If
●You need a straightforward script-in, avatar-out workflow for polished promo videos.
●You are comfortable reviewing output inside the web app before export.
●You can work with a workflow that may gate download or translation behind an upgrade.
✕ Skip This If
●You need guaranteed vertical 9:16 short-form ads.
●You need to download the final MP4 on the tested plan.
●You need a highly creator-style or emotionally expressive ad read.
video-generatoravatar-video-generatorvideo
Yes. In this test, Synthesia accepted three supplied scripts and generated finished AI-avatar videos for FutureSmart AI, Nike Pegasus 41, and Duolingo.
No. The tested workflow produced landscape-oriented videos rather than short-form vertical output.
No. The generated videos could be previewed inside the platform, but downloading required an upgraded plan.
Approximately 32 credits were consumed to generate a 16–17 second AI avatar video during testing.
Yes. The avatar picker showed multiple presenters and categories such as All Avatars, My Avatars, Shared with me, Recent, Brand kit, and Custom Avatars.
A Translate action appeared in the generated-video version menu, but the tested workflow indicated that it required an upgrade.
No. Caption editing and caption quality were not exercised in the tested workflow.

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