privacy & terms

Privacy Policy

utsushi — film contact-sheet web tool

Introduction

utsushi (the "Tool") is a free, fully in-browser web tool that turns your photos into a film contact-sheet (proof sheet). This Privacy Policy explains how information is handled in the Tool.

Collection of Information

The Tool requires no account or sign-in and does not transmit or collect any personal information to a server. Loading, processing, and exporting your photos all happen entirely within your browser (on your device).

Handling of Photo Data

  • Photos are processed only within your browser and are never uploaded to any external server (once loaded, the Tool works even in airplane mode)
  • Photo EXIF information (capture date, orientation, etc.) is used solely to build and orient the contact sheet, and is not transmitted off your device
  • The contact-sheet export (PNG / JPEG) is also generated on-device and downloaded to you. The generated image is never stored on or hosted by any server
  • The code needed to decode formats such as HEIC / DNG is loaded from the same origin as this site; your photo data never leaves it

Local Data Storage

So that a reload won’t lose your work, the Tool stores the following data within your browser (IndexedDB and localStorage). This data is not transmitted off your device, and you can clear it at any time with the on-screen reset action ("clear everything").

  • The photos you loaded (the original files and a downscaled thumbnail for display)
  • Sheet settings (format, frame count, grain / contrast, edge text, etc.)
  • Marks you drew on photos (e.g. the keep ○)
  • Preferences such as the display language

Hosting and Server Logs

The Tool is hosted on Cloudflare (static asset hosting). As pages are served, Cloudflare may record standard access logs (IP address, browser information, referrer, etc.). These logs never contain your photo data.

Analytics

To understand usage and improve the service, the Tool uses Cloudflare Web Analytics to collect aggregate data such as page views. It does not use cookies, and it does not collect personally identifying information or your photo data.

Data Sharing with Third Parties

The Tool does not sell or share collected information with any third parties. The share-to-social feature operates only when you tap the share button, through your operating system's or browser's own sharing mechanism.

Changes to This Privacy Policy

This Policy may be updated as necessary. When changes are made, the latest version will be published on this page.

Contact

If you have questions or concerns regarding privacy, please use the contact form.

Terms of Use

utsushi — film contact-sheet web tool

Acceptance

By using utsushi (the "Tool"), you agree to these Terms of Use. If you do not agree, please do not use the Tool.

The Service, As Is

The Tool is provided free of charge, on an "as is" and "as available" basis, without warranty of any kind. We do not guarantee that the Tool will be uninterrupted, error-free, or compatible with every device or browser.

Your Photos and Your Responsibility

You are responsible for the photos and content you process with the Tool, and for having the rights to use them. As described in the Privacy Policy above, your photos are processed entirely on your device and are never uploaded to us.

Acceptable Use

Do not use the Tool for any unlawful purpose, and do not attempt to attack, disrupt, reverse-engineer, or otherwise misuse the Tool or the service that hosts it.

Intellectual Property

The Tool, its source code, the utsushi brand and marks ("utsushi : 1" / "U : 1"), and its bundled fonts and assets are owned by TWDDL or its licensors. The contact sheets you create with the Tool are yours.

Limitation of Liability

To the fullest extent permitted by law, TWDDL is not liable for any loss or damage arising from your use of the Tool — including loss of data stored in your browser (for example, when you clear your browser storage or use the reset action).

Changes to These Terms

We may update these Terms from time to time. When we do, the latest version will be published on this page.

Governing Law and Contact

These Terms are governed by the laws of Japan. If you have any questions, please use the contact form.

Last updated: July 7, 2026

utsushi : 1 © 2026 TWDDL