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Jura Trace is a local-first desktop application for content verification and protection. It analyses still images for signs of manipulation, AI generation, or provenance tampering, and can embed cryptographic Content Credentials into files you own. All processing runs on your device. Nothing leaves your machine.
Developed by Juralabs Community Interest Company (UK CIC no. 17117467), Jura Trace is free and open-source under AGPL-3.0-or-later. It is built on the C2PA open standard for content provenance, and has been awarded C2PA Validator Conformant status.
The in-app help pages explain every detector, scoring formula, and limitation in detail. But those pages are only visible after installation. This wiki mirrors the most externally relevant content so that journalists, funders, partner organisations, and researchers can evaluate the methodology before they install anything. Start here, then work through the pages below.
Jura Trace is built for three overlapping audiences. Cultural institutions, archives, and news organisations use it to verify the provenance of images before publication or accession, and to protect their own assets with cryptographic Content Credentials. Independent journalists and researchers use it to investigate potentially manipulated media as part of open-source investigations. Developers and technically curious users can explore the open-source codebase, reproduce every calculation, and contribute forensic improvements. The in-app help pages, this wiki, and the source repository are all designed to serve each of these groups without requiring specialist forensic knowledge to get started.
Jura Trace processes everything on your device. No image, metadata, or analysis result is ever sent to a remote server. There is no account system, no telemetry, and no cloud dependency. The application works fully offline after installation. This architecture is a deliberate design choice, not a convenience feature. Investigations, archival records, and provenance decisions often involve sensitive or unpublished material. Your files stay on your machine. The application's licence (AGPL-3.0-or-later) and its architecture can both be audited independently to confirm this.
| Licence | AGPL-3.0-or-later-or-later |
| Developer | Jura Labs CIC (UK, Companies House 17117467) |
| C2PA Conformance | Validator Conformant, record ID 019d8d83-ed1c-787c-920c-8fad67b55cbe, awarded 6 May 2026, spec 2.2 (JPEG, PNG, TIFF, WebP) |
| CAI Membership | Content Authenticity Initiative Member since 28 May 2026 |
| Forensic detectors | 13 (10 automatic + 3 on-demand investigation tools) |
| AI detection FP rate | GBM v4: 4.54% / UnivFD v10onnx: 3.87% (on held-out test set) |
| Platforms | macOS (Apple Silicon), Windows (x64). Linux installer planned for a future release. |
| Architecture | Local-first, no telemetry, no cloud calls |
- Methodology: how the trust score is computed, all 13 detectors explained, known limitations. The flagship transparency page.
- Format-Support: which file formats are supported for verification and signing, and what each format receives from the pipeline.
- Glossary: plain-language definitions of every technical term used in the application and this wiki.
- Model Cards: full training data documentation for GBM v4 and UnivFD v10onnx.
- Compliance: local-first data governance, AGPL-3.0-or-later licence obligations, and C2PA conformance statement.
- Continuity: what happens to your protected assets if Jura Labs CIC ever ceases operations.
- How It Works: a guided walkthrough of the verify and protect pipelines for non-technical readers.
Installers for macOS (Apple Silicon) and Windows (x64) are available at juralabs.org/download. A Linux installer is planned for a future release.
The source repository is at codeberg.org/jura-labs/jura-trace, mirrored read-only at github.com/Jura-Labs/jura-trace. Installers only; source is in the private development repository per the AGPL release model.
Questions, bug reports, and accessibility feedback: hello@juralabs.org
Jura Trace is built by a one-person CIC with no venture funding. If it is useful to you, donations help sustain development: buy.stripe.com/cNibJ19g473m3v1cj88og00
Last updated 2026-06-04 for Jura Trace v1.0.