Version 1.0 · in force since 19 August 2026
These terms govern the use of the website www.lukaswojcik.com including the blog, the Toolbox and the contact form. They apply from the first retrieval of a page. Anyone who does not accept them is asked to refrain from using the site.
1. Provider
LW IT Solutions Company Lukas Wójcik
al. Tadeusza Kościuszki 80/82, lok. 301
90-437 Łódź, Poland
NIP: PL7252266190 · REGON: 369859995
E-mail: contact@lukaswojcik.com
The business is entered in the Polish register of business activity (CEIDG). The person responsible for the content is Lukas Wójcik at the address given above.
2. Subject matter and scope
This website provides technical articles, diagrams and a collection of browser-based tools, all of them free of charge and without any obligation to register. No user account is created, and no contract for the use of the site comes into being. A right to permanent availability of the site or of individual functions does not exist.
These terms cover the site itself. Contracts for services rendered by the provider are concluded separately and in writing; nothing on this website constitutes a binding offer within the meaning of Art. 66 of the Polish Civil Code.
3. The Toolbox
The Toolbox contains calculators, generators, validators and analysers for questions of web analytics, tracking, network planning and software development. The following applies to all of them.
3.1 How the tools work
Almost every tool runs entirely in the browser. The tools themselves send nothing: values entered are processed locally and are transmitted to no server. This has a practical consequence worth knowing: results exist only for as long as the page remains open. Anything that is to be kept must be copied out or saved before the tab is closed.
With consent, this website also records sessions and produces heatmaps, as the Privacy Policy sets out in section 7, and such a recording captures the displayed page. The containers in which the tools show their results are marked as areas to be masked, so the recording replaces their content before transmitting anything: a replay shows that a result appeared, not what it said.
3.2 No warranty as to results
The tools are made available in the state in which they happen to be, without warranty of any kind as to correctness, completeness or fitness for a particular purpose. Their outputs are aids to orientation. They replace neither an independent check nor professional advice, and in particular they constitute neither legal advice nor tax advice nor a data protection assessment.
This deserves to be stated concretely, because several tools touch on regulated subject matter. A tool that examines a GA4 configuration for personally identifiable data indicates findings; it does not certify compliance with the GDPR. A tool that calculates cookie lifetimes models browser behaviour; it does not establish what a supervisory authority will consider permissible. A capacity calculation for hardware yields an estimate, not a dimensioning that could be relied upon in a production environment. Responsibility for every decision taken on the basis of these outputs rests with the person taking it.
3.3 Tools with Google sign-in
Four tools read data out of a Google account and therefore require sign-in through Google: the GTM Container History Deep Search Engine, the GA4 PII Checker, the GA4 Anomaly Detector and the GA4 Bot Detector. The permissions requested are read-only in every case; none of these tools can change, create or delete anything in a connected account.
Access tokens and retrieved data remain in the browser and are not transmitted to the server of this website. The handling of data received from Google APIs follows the Google API Services User Data Policy including its Limited Use requirements. The details are set out in the Privacy Policy.
Use of these tools is subject in addition to the terms of the respective Google service. Anyone signing in must be entitled to access the account concerned. The permission granted can be withdrawn at any time at myaccount.google.com/permissions.
4. Content and rights of use
Articles, diagrams, images, the layout and the source code of this website are protected by copyright under the Polish Act on Copyright and Related Rights of 4 February 1994. All rights are reserved by the provider unless stated otherwise at the place in question.
4.1 What is permitted without asking
- Reading, printing and storing individual articles for personal, non-commercial use.
- Quoting extracts in accordance with the right of quotation, provided the source is named and a link to the original article is given.
- Using the code examples shown in the articles – snippets of JavaScript, SQL, PHP, configuration fragments and the like – in own projects, including commercial ones. These examples are released for use without a fee and without any obligation of attribution. They come, as does everything else here, without warranty.
4.2 What requires prior consent
- Reproducing complete articles or substantial parts of them, in any medium.
- Translating, editing or otherwise adapting the texts and diagrams.
- Using texts, diagrams or images for the training or fine-tuning of machine learning models. The rights holder expressly reserves the right of text and data mining pursuant to Art. 4(3) of Directive (EU) 2019/790 and Art. 26(4) of the Polish Copyright Act. This reservation applies irrespective of whether an automated system evaluates it.
- Copying the Toolbox tools, in whole or in the substance of their functioning, into other offerings.
Requests for permission are welcome by e-mail and are usually answered quickly.
5. Permitted use
The site may be used for its intended purpose. The following are not permitted:
- Automated retrieval at a frequency that impairs operation of the site, as well as scraping of the entire site or of large parts of it. Search engine crawlers that observe the rules in
/robots.txtare unaffected by this. - Attempts to circumvent security measures, to obtain access to areas that are not publicly accessible, or to test the site’s resilience without prior agreement in writing. Security researchers who find a vulnerability are asked to report it to contact@lukaswojcik.com before publishing it; such reports are welcome and are dealt with promptly.
- Introducing malware, sending automated form submissions, and any use that impairs the operation of the site or the use of it by others.
- Using the contact form for advertising, for unsolicited offers or for mass messages.
6. Comments
Articles in the blog can be commented on. Responsibility for a comment rests with its author. Comments must not infringe the rights of third parties, must not contain insults, threats, incitement or advertising, and must not disclose personal data of other persons.
A comment by an author who has not had one approved before is held back and appears only after review. Comments may be shortened or refused without a statement of reasons; a right to publication does not exist. By submitting a comment, its author grants the provider the non-exclusive, unlimited right to keep the comment available beneath the article in question.
7. Third-party trademarks and independence
Google, Google Analytics, Google Tag Manager, GA4, Looker Studio, BigQuery, Android and Chrome are trademarks of Google LLC. Meta and Facebook are trademarks of Meta Platforms, Inc. Adobe and Adobe Analytics are trademarks of Adobe Inc. Matomo is a trademark of InnoCraft Ltd. All other product names, company names and logos mentioned are the property of their respective owners and are used here solely for the purpose of description.
The provider is an independent consultancy and development business. There is no partnership with, no certification by and no other affiliation with Google LLC, Meta Platforms, Adobe Inc. or InnoCraft Ltd. The tools in the Toolbox are neither developed, endorsed nor reviewed by those companies.
8. External links
Links to external websites are provided as references. Responsibility for the content of a linked page rests with its own operator. The linked pages were checked for evident infringements at the time the link was set. A permanent monitoring of external content without any concrete indication of an infringement is neither reasonable nor required; where an infringement becomes known, the link concerned will be removed without delay.
9. Availability
The site runs on infrastructure operated by the provider. Interruptions caused by maintenance, faults, power failures or disturbances of the internet connection are therefore possible and are not announced. No availability is warranted and no service level is owed. Functions may be changed or discontinued at any time; a tool once published does not have to remain available.
10. Liability
The provider is liable without limitation for damage caused intentionally or by gross negligence, for injury to life, body or health, and to the extent that liability is mandatory under the applicable law – for consumers in particular under the provisions of the Polish Civil Code and the Act on Consumer Rights of 30 May 2014, which are not affected by these terms.
Beyond that, liability for slight negligence is excluded, in particular for damage arising from the use of the Toolbox outputs, from the unavailability of the site, from loss of data, and from decisions taken on the basis of the content published here.
11. Enquiries via the contact form
Enquiries submitted through the contact form are answered as far as time permits. A claim to an answer does not exist, and an answer given does not constitute advice in the legal sense unless a separate agreement to that effect has been concluded. The submission of an enquiry does not bring about a contract.
12. Data protection
Which data are processed when this site is used, on what legal basis and for how long, is set out in the Privacy Policy, which forms part of these terms.
13. Changes to these terms
These terms may be amended where a change in the offering or in the legal position requires it. The version in force is always the one retrievable here, with the date of entry into force stated at the top of the page. Continued use after a change is deemed to be acceptance of the amended version.
14. Applicable law and place of jurisdiction
Polish law applies, with the exclusion of its conflict-of-law rules. For consumers domiciled in the European Union this choice of law does not deprive them of the protection afforded by the mandatory provisions of the law of their country of habitual residence.
The place of jurisdiction for disputes with businesses is Łódź, Poland. For consumers, the statutory rules on jurisdiction apply. Consumers in Poland may additionally seek free assistance from the district or municipal consumer ombudsman (powiatowy lub miejski rzecznik konsumentów) or from the Office of Competition and Consumer Protection at uokik.gov.pl.
15. Severability
Should individual provisions of these terms be or become invalid, the validity of the remaining provisions is not affected. In place of the invalid provision, the statutory rule applies.