Terms of use
Last updated: July 4, 2026
About this service
Karu Tools provides free web-based utilities — such as character counting, age calculation, and bill splitting — that run entirely in your browser. As a general rule, your input is processed locally and is not sent to or stored on any server. (Exceptions, such as the use of external APIs or storage features, will be clearly stated on the respective tool pages.)
Disclaimer
Tool results are provided as a general reference. The site does not guarantee the accuracy, completeness, continuity, or fitness for a particular purpose of any tool or content.
For decisions that matter, always verify results against your original source data or official information. For professional matters such as medical, legal, tax, financial, or employment-related decisions, prioritize official sources or a qualified professional. The site accepts no liability for any loss or damage arising from the use of any tool.
Copyright and content use
The text, design, and code on this site belong to this site or its contributors. Personal, non-commercial reference is welcome. Reproduction, redistribution, or commercial use without permission is not permitted.
Prohibited use
The following actions are not permitted when using this site:
- Placing excessive load on the site's servers or network
- Reproducing, redistributing, or selling site content without permission
- Using the site in a way that violates the rights of others or applicable law
- Automated access that goes beyond ordinary browsing
Advertising and external services
This site may use third-party advertising services such as Google AdSense and analytics tools to help cover operating costs and improve the service. The handling of cookies and similar technologies related to ads and external services is described in the Privacy policy.
Ads are placed so they do not interfere with tool input or result checking. Ad slots and ad links are labeled so they can be recognized as advertising. The site is not responsible for information, products, or services provided on external sites or ad destinations.
Contact
You can report bugs or send improvement requests from the contact page. The contact form uses Google Forms, so submitted information is also sent to Google.
Changes and suspension
Features may be changed, suspended, or removed without prior notice for improvement, maintenance, or operational reasons. These terms may also be updated without notice. Any changes will be posted on this page along with an updated date.
Governing law and jurisdiction
These terms are governed by and construed in accordance with the laws of Japan. Any disputes arising from the use of this site shall be subject to the exclusive jurisdiction of the courts of Japan.