Tero Subtitler
Tero Subtitler is a free, open-source subtitle editing and creation tool for macOS, Windows and Linux. It supports over 60 subtitle formats and lets users create, edit, and manipulate subtitles with features including SMPTE/MEDIA timing modes, frame and video rate conversion, spell checking, auto-backup, search and replace, and audiovisual preview with waveform timeline. The app also includes automatic transcription via whisper.cpp and auto-translation via Google Translate. It is particularly useful for video producers, translators, and subtitle professionals who need flexible, format-agnostic subtitle handling without licensing restrictions.
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1 suggestionTero Subtitler has a native Apple Silicon (MacARM64) build available from the official download page at videohelp.com — the latest releases include distinct Mac (Intel) and MacARM64 (native) downloads, so you must select the MacARM64 version to get native performance on M-series Macs. The search results confirm the project is actively maintained, with the most recent release (1.0.2.2 Alpha) published in April 2026 including macOS-specific bug fixes. Since the app is distributed directly from videohelp.com rather than through the Mac App Store or a vendor installer, visit the download page, locate the MacARM64 build for your M-series Mac, and install that — do not download the generic "Mac 64-bit" (Intel) version by mistake. Because the app is still in alpha development, be aware that it may contain occasional bugs, but the active maintenance and dedicated native build support mean it will continue to work on your Mac when Rosetta 2 is removed in September 2028.
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