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A professional network toolbox —
clean enough for every day.

A 58-protocol decoding engine with protocol families, packet capture, serial/MQTT and SSH/Telnet/ADB — plus file transfer, downloads and a one-click network checkup. Windows and WSL2 Ubuntu. privacy by design

Download for Windows setup.exe Download for WSL2 Ubuntu .deb Verify SHA256SUMS

Requires admin rights for packet capture on Windows. WSL2 build is intended as a debugging / server-side toolbox — see the capability matrix below.

Three things we do better

1 · A protocol engine that cannot lie about its rules

  • 58 built-in protocols across industrial, telecom, IoT and Internet families
  • Protocol families: pick szl4 once and every message type of that protocol decodes — dispatched per member, each with its own framing rule
  • Framing: fixed length, length-prefixed (with explicit "does the length include itself / header / trailer" semantics) and terminator-delimited, plus a max-frame guard
  • A fixture-verified gate: every rule must prove it decodes exactly one whole frame, with no residue. Rules that can't prove themselves don't ship.
  • Never silently drops data: resynchronises after garbage, waits on half-frames, hands unrecognised frames to you verbatim
  • Rules are files, not hard-coded logic — with your own rules folder

2 · A transfer engine built for the awkward cases

  • Large files, transferred directly
  • Huge numbers of small files, aggregated
  • Interrupted transfers, resumed
  • Copies of detected media links go to whatever tool you prefer — we don't force ours

3 · One tool for host and WSL

  • The same app on Windows and inside WSL2 Ubuntu
  • Host-side and WSL-side debugging share one toolbox
  • We document exactly where the WSL experience differs — no surprises

Android

The cross-device experience — including a mobile companion — is in planning. There is no date to announce yet, and no Android build is downloadable today; follow the repository to hear when it lands.

What's inside

Network tools

TCP client/server, UDP, MQTT, serial; live protocol decoding; packet capture.

Remote

SSH, Telnet, ADB, FTP/SFTP with file transfer.

Downloads

HTTP, BitTorrent and magnet; resume; bounded retries; plain-language failure reasons.

Device link

Share, groups and messaging between devices.

Media

Local playback and a media centre.

Browser & recording

Built-in browser with resource detection; screen recording with audio on Windows.

Screenshot / short GIF placeholder — capture at 1280×800 (dark UI), one per area above.

Platform support

CapabilityWindowsWSL2 Ubuntu
Core toolbox, transfer, downloads, protocol decoding✅✅
Graphical interface✅ nativerequires WSLg (Windows 11)
Packet capture✅ via Npcap — host/LAN traffic⚠ only the WSL virtual NIC is visible
Serial ports✅ COM ports⚠ requires usbipd-win
Screen recording audio✅not available
Hardware video decoding✅depends on /dev/dri; falls back to software
Privilegesadmin for captureroot / cap_net_raw for AF_PACKET

We publish this table on purpose: the Linux build is a debugging / server-side toolbox, not a 1:1 copy of the Windows experience.

Privacy

  • No telemetry by default.
  • No third-party advertising SDKs — the in-app promotion slots are our own content.
  • Diagnostics are off by default, and when off they neither upload nor write anything.
  • Remote requests (ad manifest, update check) happen only if you configure them.

Responsible use

Yutide is a general-purpose networking tool. Download only what you are entitled to download and comply with the terms of the sites you use and the laws that apply to you.

  • We do not circumvent DRM or technical protection measures, and we do not bypass paid access.
  • Built-in media rules are protocol-level only (HLS/DASH/direct media). Site-specific adapters are user-supplied.
  • Copying a detected resource link merely exposes a URL your browser already fetched — using it is your decision.

Roadmap

The cross-device experience is in planning, including the Android companion. There is no date to announce; follow the repository to hear when it lands.

GitHub repository Report an issue

License

Yutide is proprietary software — no source-code licence is granted. Free for personal, learning, research, evaluation and non-profit use. Using the protocol-parsing features in a company or other organisation requires a commercial licence; every other feature is unrestricted. See LICENSE, PRIVACY.md and THIRD_PARTY_NOTICES.md (all shipped with the app and openable offline from the About page); protocol-definition provenance is in docs/PROTOCOL_PROVENANCE.md.

Pricing

No feature is withheld. Personal and other non-commercial use is free. Commercial use of the protocol-parsing features requires a commercial licence — the exact scope is in the License section above. Follow the repository for updates.