Professional timecode · Free · Zero install
LTC Timecode
In Your Browser

Generate and decode SMPTE Linear Timecode directly in your browser. Frame-accurate LTC output, real-time decoding, and direct Pro Tools MTC sync over Web MIDI. No downloads, no plugins, no hardware required.

Generator
LTC Output
Biphase mark encoded SMPTE LTC via Web Audio API. Routes to any audio output or internal loopback.
Decoder
Audio Input
Decodes LTC from any audio input; physical line-in, virtual cables, or internal loopback.
MTC Sync
Web MIDI
Connects directly to Pro Tools and other DAWs over MIDI; no software to install, no bridge process to run.
Frame rates
All Standards
23.976 · 24 · 25 · 29.97 DF · 30. Automatic frame rate detection on decode.
Platform
Chrome · Edge · Firefox*
No account, no subscription, no install. Chrome or Edge recommended for Web MIDI. *Firefox requires an extra browser add-on. Safari has no Web MIDI API.
By
DOTWAV
Professional audio-visual tools. Part of the DOTWAV suite of production utilities.
Browser support
Use Chrome or Edge for Best Results

CLOK's DAW sync relies on the Web MIDI API. Chrome and Edge support it natively. Click Start and grant permission, that's it. Firefox 108+ supports Web MIDI but requires installing a site-specific browser add-on before the API will respond; if you use Firefox, expect an extra setup step. Safari and iOS don't implement Web MIDI at all and have no plans to add it. LTC generation and decoding still work in Safari, but Pro Tools/DAW sync won't.

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Peer-to-Peer. Zero Install.

DOTWAV SuiteView is a professional P2P live review platform built for post-production. Stream your cut, grade, mix or VFX pass to any client, anywhere; at full resolution, with frame-accurate timecode from CLOK locked to your session. No plugins. No relay server. No compromise.

Learn More ↗
Starts at £25/mo  ·  Free viewer seats  ·  CLOK-integrated
P2P
Peer-to-Peer Architecture
Streams directly from your suite to your client's browser; no relay server, no transcoding, no middleman. DTLS-SRTP encrypted end to end.
8K
8K-Ready Pipeline
Full resolution, full frame rate output sourced directly from professional capture hardware. What leaves your machine is exactly what your client sees.
7.1
Multi-Channel Audio
From mono to 7.1 surround via Multiopus; the same audio your mix engineer is hearing, delivered intact to any browser.
NOTES
Frame-Accurate Notes
Clients mark moments as they watch; categorised, timestamped to the frame, and exported as PDF, CSV, Pro Tools PTX or MIDI.
Generator idle
Decoder idle
Generator output 25 fps
00:00:00:00
SourceIdle
±00:00:00:00
→
Route
→
Decoded input -- fps
--:--:--:--
InputWaiting
No lock
▶ Generator
Settings
▼
Frame rate
Start TC
Offset (fr)
Output routing
▼
Route LTC to
Internal loopback active — no cables or routing needed
Signal status
Idle
Bitstream teal = sync word
Engine stats
0
Frames out
0ms
Buffer
2000
bps
00:00
Uptime
MTC → LTC Chase
Follow decoded input — generator outputs LTC locked to incoming MTC/LTC signal
Chase off
◆ Decoder
Input routing
▼
Decode from
Bridge address
Not connected
Run node bridge.js in the CLOK Bridge folder.
Pro Tools → Setup → Peripherals → MTC out → IAC Driver Bus 1
Signal status
Idle --
Decoded bitstream teal = sync word
Decoder stats
0
Frames dec
--
Det. FPS
--
Signal
--
Lock time
Frame history
Decoder log
MTC output → DAW
▼
Send MTC via
MIDI output
Not connected
Chrome or Edge recommended. Firefox 108+ works but requires a site-specific browser add-on — see the browser console if access is denied.
DAW → set MTC input to IAC Driver Bus 1 (or CLOK BRIDGE bus)
Idle