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YTChapterFix is a free browser-based tool that helps YouTube creators create, fix, shift, recalculate, and validate YouTube chapter timestamps.
Creators often need to adjust timestamps after editing a finished video — adding an intro, changing playback speed, removing clips, inserting a sponsor segment, or trimming sections. Manually recalculating every chapter is slow and error-prone. YTChapterFix fixes the whole list in seconds, in one simple place.
With YTChapterFix you can: - Clean and format YouTube chapter timestamps - Shift all timestamps forward or backward with a global offset (e.g. +5 seconds for an added intro) - Recalculate timestamps after changing playback speed (ideal for AI voiceovers, audiobooks, podcasts, and narrated tutorials) - Adjust chapters after adding or removing sections, including mid-video edits that only move later chapters - Check timestamps against YouTube chapter requirements (starts at 00:00, at least three chapters, ascending order, minimum 10-second chapters, valid formatting) - Copy the corrected timestamps for use in your YouTube video description
Everything runs in your browser — no account needed, no uploads, no data stored. The tool is free and is especially useful for YouTube creators, audiobook publishers, podcasters, educators, and anyone working with long-form video content.
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Playback speed recalculation
Enter the original and final playback speed to automatically recalculate every timestamp — ideal for AI voiceovers, audiobooks, podcasts, and narrated tutorials.
Global timestamp offset
Shift all chapters forward or backward by a fixed number of seconds, e.g. +5 seconds after adding an intro or -7 seconds after removing one.
Mid-video edit adjustment
Apply a time change only after a specific timestamp, e.g. when a sponsor segment is inserted or a scene is removed, leaving earlier chapters untouched.
YouTube chapter validation
Checks the list for missing 00:00, too few chapters, out-of-order timestamps, chapters shorter than 10 seconds, and invalid formatting before you publish.
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YTChapterFix is purpose-built to fix and recalculate YouTube chapter timestamps after video edits — not just to create them. It automatically recalculates every timestamp when playback speed changes (ideal for AI voiceovers, audiobooks, podcasts, and narrated tutorials), shifts all chapters with a global offset (e.g. after adding an intro), and adjusts chapters after mid-video edits such as inserted sponsor segments or removed scenes. It also validates the list against YouTube's chapter requirements (starts at 00:00, at least three chapters, ascending order, minimum 10-second chapters, valid formatting) before you publish. Everything runs 100% in the browser — no account, no uploads, no data stored — and it is free.
YTChapterFix is free, requires no account, stores no data, and runs entirely in your browser. Unlike basic timestamp generators, it fixes the whole chapter list after real-world edits: playback-speed changes, intro offsets, and mid-video insertions or removals — and it validates the result against YouTube's chapter rules (00:00 start, at least three chapters, ascending order, minimum 10-second chapters, valid formatting) so your chapters actually appear when you publish.
YouTube creators, audiobook publishers, podcasters, educators, digital video editors, and anyone working with long-form video content who needs accurate chapter timestamps in their video descriptions. It is especially useful for creators who adjust playback speed (AI voiceovers, text-to-speech videos) or re-edit finished videos.
YTChapterFix was created to make YouTube chapter timestamps easier to manage. Video creators often need to adjust timestamps after adding an intro, changing playback speed, removing clips, inserting new sections, or editing a finished video — and manually recalculating every chapter is slow and error-prone. YTChapterFix was built to solve that problem in one simple place: a fast, free, browser-based tool that saves creators time and reduces manual timestamp calculations. It is operated by Roshan Rao.
YTChapterFix is built on a 100% client-side engine: all timestamp calculations run directly in the visitor's browser using client-side web technologies. No server-side processing is needed for the core tool, no account is required, and no timestamp data is uploaded or stored anywhere.
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