Field Timer v0.3.8

A free OBS countdown timer, stopwatch and presenter clock for Windows and Linux.

Designed for live events, presentations, conferences and streaming, Field Timer provides simple timer controls, customizable time displays and remote operation through Bitfocus Companion.

Display your timer as a transparent OBS Browser Source or a continuously updated TXT file. Runs locally and offline, with no accounts, subscriptions or dedicated OBS plugins required.

Main features

• Countdown, stopwatch and local 12/24-hour clock with custom time formatting.
• A transparent local OBS Browser Source with configurable fonts, colors, warning threshold, negative-overtime color, alignment presets and X/Y positioning.
• One continuously updated TXT file as an alternative OBS text source.
• Timer controls in a local web interface or HTTP API, plus a Companion HTTP Builder for Bitfocus Companion Generic HTTP Requests. Stream Deck buttons can control it through Companion; no custom module is needed.
• Standalone Go executables, MIT license, offline use, no cloud account or subscription, and no OBS API or Field Timer OBS plugin. Windows has a tray launcher; Linux has no tray.

What's new in v0.3.8

Enable LAN access fills the listener address; save and restart to activate it. The Companion builder detects private IPv4 interfaces, selects the preferred address, offers alternate interfaces, and preserves manually edited hosts. Network discovery stays local-only. Existing timer behavior, overlay, TXT output and stored settings are retained.

Download and run

Platform	Download	Quick installation
Windows x64	FieldTimer-Windows-v0.3.8.zip	Extract, then double-click fieldtimer.exe. Use start-portable.cmd for settings beside the executable.
Linux x64	FieldTimer-Linux-v0.3.8.zip	Extract, run chmod +x fieldtimer start-portable.sh, then ./start-portable.sh. Add --open=false for headless use.

SHA256SUMS.txt is available to verify your download. Exit the previous version before upgrading and keep the same configuration location to retain settings and the API token.

Open http://127.0.0.1:8788 on the Field Timer computer. For OBS, use http://127.0.0.1:8788/overlay as a Browser Source on that same computer; match its dimensions to the OBS canvas and use one visible timer source.

For Companion on another computer, enable LAN access, save, restart, and copy the builder's request using the actual host address and a bearer-token header. Defaults are local-only. Use a trusted private LAN/VPN and never port-forward the HTTP service. Linux OBS needs a package with Browser Source support; TXT output is an alternative.

The owner confirmed v0.3.8 on Ubuntu Studio including OBS Browser Source. Automated checks and the public-release Linux executable smoke test passed. Other deployment-specific checks are described in the verification record.

User guide · Companion setup · README

Field Timer is an independent project, not officially endorsed by OBS, Bitfocus or Elgato. This documentation refresh does not change the v0.3.8 tag, application, release ZIPs or checksums.