Engine Licence

Version and effective date: 2026-11-07, the same version as the terms and the privacy policy.

Who grants it and when it applies

The licensor is Vitali Bibikov, a sole proprietor (JDG) registered in CEIDG, NIP 5213977371, REGON 522636099, trading as AIErudit (“we”). This licence applies each time your browser receives any part of the engine, and you accept it together with the terms, of which it forms part. Where the terms and this licence differ on the engine, this licence applies. Words defined in the terms, such as “automated agent”, mean the same here.

What the engine is

“The engine” is the image-processing code we wrote that this site sends to your browser to run a stack: its JavaScript modules and workers, its WebAssembly modules and its model and data files, in every form, order and number of parts in which they are delivered, and any copy, translation or adaptation of them. It does not include the third-party components and data listed on the credits and licences page, which are licensed to you under their own licences, not this one. The engine is copyright © 2026 Vitali Bibikov, a sole proprietor (JDG) registered in CEIDG, NIP 5213977371, REGON 522636099, trading as AIErudit and is licensed, not sold.

What you may do

We grant you a limited, revocable, non-exclusive, non-transferable and non-sublicensable licence to let your browser download the engine from startrailstacker.com, keep the copies your browser or device makes on its own, for example in memory and in its cache, and execute the engine, only inside a browser session on startrailstacker.com that you operate yourself, to process your own images: images you made or are otherwise entitled to process. You may also make copies we ask you to make for support. You may use, sell and publish the images it produces, subject to the rights in your source material.

What you may not do

Except as the section on rights the law keeps for you allows, you must not:

• download, save, copy, record or export the engine or any part of it other than as described above;
• extract the engine’s WebAssembly modules, worker code or other parts from your browser’s memory, cache, storage, developer tools or network traffic, or reconstruct the engine from the parts in which it is delivered;
• execute the engine anywhere other than a browser session on startrailstacker.com, for example from another website or domain, an application, a command-line runtime or a server;
• reverse engineer, decompile or disassemble the engine;
• deobfuscate the engine or reverse its minification;
• translate or port the engine into another language or product, or create a program that reproduces its expression, including from code obtained by decompilation;
• modify the engine’s code;
• let an automated agent run, retrieve, store, analyse or transmit the engine or the requests that deliver it, except assistive technology and browser features the terms allow;
• submit, paste or upload any part of the engine, or a capture of the requests that deliver it, to an AI model, code assistant or analysis service;
• make the engine’s processing available to others as a service, for example through a server, an API, a bot or a shared account;
• avoid, bypass or impair any technical measure we use to control access to or use of the engine;
• remove, alter or obscure the engine’s licence notices or identifying marks; or
• use the engine or its code to train, evaluate or benchmark a machine-learning or AI system.

This licence does not stop you from writing independent software that does not copy the engine’s code, or from publishing honest reviews, comparisons or benchmarks of the tool or its results. To use the engine in any other way, ask us about a commercial licence.

Third-party components

The RAW decoder includes LibRaw, zlib and libjpeg; our WebAssembly includes the Rust standard library; the site also uses ONNX Runtime Web and a lens database derived from Lensfun under CC BY-SA 3.0. These are licensed under their own terms, listed with their source and notices on the credits and licences page. This licence does not restrict any right those licences give you, including your rights in LibRaw’s source code under CDDL-1.0 and your rights in the lens database under CC BY-SA 3.0. Any terms in this licence that differ from those licences are offered by us alone.

Rights the law keeps for you

The terms’ section Rights the law keeps for you applies to this licence and prevails over it. It preserves mandatory rights such as observing, studying or testing how the engine functions while running it as this licence permits, correcting errors, and decompiling for interoperability, within the conditions the law sets and the procedure the terms describe.

How the licence ends

This licence ends when your permission to use the tool ends under the terms, as described in Ending your permission. The survival rule there applies to this licence.

Enforcement and law

Any use of the engine outside this licence is unlicensed. If we find the engine, or code copied from it, used or published outside startrailstacker.com, we will enforce our rights as described in the terms. The governing law, the courts and your rights as a consumer are those set out in the terms.

Questions

Ask through the contact page. Legal notices may be sent in writing to the postal address in the terms.