By Team Hypomnema · Updated October 19, 2026
Mark, validate and export video chapters with precise timestamps.
Create and export
Add your content or start with the editable sample.
Adjust the preview and settings. Expand the editor for more space.
Review and download your finished result.
Methods and limits
Manual chapters normally need a 00:00 start, at least three chapters and at least 10 seconds per chapter. Final chapter length is checked only when duration is supplied. Platform eligibility and automatic chapter display are not guaranteed. CSV, JSON and timestamped lines accepted, up to 100 chapters.
Local processing
Files and inputs stay in browser memory. Only the shared media engine is downloaded when needed; no media is uploaded. Exported files contain the content you select. Refreshing clears this workspace.
Try the workflow
Keep your original documents and review the output. You can also browse all guides or contact Team Hypomnema.