Everything you need for styled captions
VidLocalizer automates the entire localization workflow for YouTube creators — MrBeast-style styled captions, subtitle & metadata translation into 100+ languages, offline transcription, voice dictation and one-click upload to YouTube Studio.
The whole localization workflow, automated
A desktop application for YouTube creators that connects to your channel via the official API and handles everything — from translation to publishing — without manual work.
Titles & descriptions
Translate metadata into any language and upload it straight to YouTube.
Subtitle files
Translate SRT, VTT, SBV and TXT into multiple languages at once.
Styled captions
Create YTT captions with color highlights and word-by-word animation.
One-click upload
Push every translation directly to YouTube Studio in a single click.
All operations use the official YouTube Data API v3 and Google OAuth 2.0. Your password is never stored — the app acts on your behalf with a limited-scope access token kept only on your device.
Styled captions, like MrBeast
Word-by-word animated captions are the #1 retention hack of top channels — exported as native YouTube YTT tracks, not overlays. Style once, then translate the whole thing into 100+ languages.
Word Highlight
All text stays visible while the currently spoken word lights up in real time. The classic MrBeast style — viewers follow along effortlessly. Optional per-word animation.
Color Cycling
Each subtitle line is shown in a different color from your palette, cycling through them in sequence — a dynamic, eye-catching look across the whole video.
Style
Pick a mode, preset and colors — applied to every YTT you make.
Parse SRT
Reads your source file and extracts every line with timestamps.
Translate
Each line is translated into every selected language.
Generate YTT
Builds ru.ytt, en.ytt, es.ytt… with your styling baked in.
Upload
Each file becomes a caption track on your video — one click.
Five tools, one workflow
Translation, transcription, dictation, sync and direct upload — everything a multilingual channel needs in a single desktop app.
Subtitle Translation
Translate subtitle files into 100+ languages at once while preserving exact timing and formatting. SRT, VTT, SBV and TXT are all supported, with AI-quality neural translation that sounds natural to native speakers.
100+ languagesTitle & Description
Drop a title.txt and description.txt into a folder and localize them into any number of languages — with SEO adapted to each country's real search queries, not word-for-word.
SEO-awareTranscribe
No subtitle file? Drop any video or audio in and Whisper AI generates a perfectly timed SRT — running entirely on your device. Choose a model from Tiny to Large to trade speed for accuracy.
Offline · privateDictate
For silent videos — cooking tutorials, product demos, time-lapses. Watch your video and record subtitles in your own voice in real time; each line is timestamped to the exact moment automatically.
Real-time voiceSubtitle Sync
Subtitles drifting or shifted? Load the file and the audio/video, and Whisper AI re-aligns each line to the exact word it belongs to. Fixes drift, frame-rate mismatches and bad cuts — saved as a new file.
AI alignmentDirect Upload
Subtitles, titles, descriptions and styled captions are pushed directly to YouTube Studio via the official API. Existing tracks for a language are updated automatically — no manual steps.
YouTube StudioBuilt for real production
Open formats, on-device AI and the official YouTube API — nothing locked behind a black box.
From install to published in 4 steps
No technical setup — activate, connect, translate and publish.
Activate license
Enter your key at first launch. Every plan includes a free 3-day trial — no charge until it ends.
Sign in with Google
Connect your YouTube channel via secure OAuth. Your email and an Active badge appear in the header.
Translate
Pick subtitles, titles or styled captions and choose your target languages — the app does the rest.
Upload
Push everything to YouTube Studio in one click, then Open Studio to verify the results.
Get a subtitle file no matter what
No SRT? Silent video? Out-of-sync file? Three on-device AI tools cover every case — so you always have a clean subtitle track to translate and style.
Transcription
Whisper AI turns any video or audio into perfectly timed subtitles — running entirely on your computer. Audio never leaves your device.
- Fully offline — nothing is uploaded
- Models from Tiny (fast) to Large (most accurate)
- Automatic spoken-language detection
- mp4, mkv, mp3, wav, m4a, webm, mov, flac, aac
- Built-in editor to fine-tune the result
Dictation
Watch your video and speak the subtitles in your own voice — in real time. Each line is timestamped to the exact moment automatically.
- Perfect for silent videos — cooking, tutorials, time-lapses
- Every clip auto-aligned to the video timecode
- Works with any microphone
- Speak naturally — pause and re-record any line
- Fine-tune everything in the built-in subtitle editor
Synchronization
Subtitles right but timings off? The app re-aligns every line to the exact word in the audio. The text never changes — only the timecodes.
- Fixes constant shift and gradual drift
- Subtitle text stays untouched — timings only
- Saved as filename_synced.srt
- Handles frame-rate mismatches and bad cuts
- Same audio/video formats as Transcribe
Straight into YouTube Studio
Subtitles, titles, descriptions and styled captions are pushed directly to your channel through the official YouTube Data API v3 — no manual uploading, no copy-paste.
English✓ uploaded
Spanish✓ uploaded
German✓ updated
Japaneseuploading…
PortuguesequeuedBuilt for whole channels, not single videos
Localize an entire back-catalog and manage multiple channels from one app.
Batch processing
Pick your videos, pick your languages, hit run — the app translates and uploads everything automatically. Localize a whole playlist in one go.
Multi-account
Connect several YouTube accounts and switch between them in one click. Made for agencies and managers handling client channels.
Yours, secure, in your language
Licensing & security
Your license is tied to your device via a hardware fingerprint (HWID). Moving to a new PC is one click in Settings — and all your data is stored locally, never on a server.
- License bound to your device (HWID)
- Transfer to a new PC from Settings
- Tokens & data stored locally only
- Verify app integrity & clear cache anytime
Interface in 32 languages
The app itself is translated into 32 languages. Switch from the bottom-left corner and every tab updates instantly — no restart needed.
+21 more