LumaTool Editorial Team

Subtitle & YouTube Caption Guides

Practical tutorials for extracting, cleaning, converting, translating and optimizing subtitles.

Featured Guide

Subtitle Editing

Repair punctuation, repeated fragments, names, segmentation, and filler noise without destroying the original timing evidence.

Subtitle Editing

Distinguish exact duplicate cues from rolling auto-caption fragments and remove repetition without deleting intentional speech.

Published 2026-08-10 · Updated 2026-08-10

Subtitle Editing

Merge consecutive or partial subtitle files with explicit offsets, boundary checks, and deterministic cue renumbering.

Published 2026-08-10 · Updated 2026-08-10

Subtitle Editing

Resegment long subtitle cues using syntax, reading time, line balance, shot changes, and target-language context.

Published 2026-08-10 · Updated 2026-08-10