Terms of Service

Last Updated: August 15, 2026

Service provider

Lingerlet is a personal project operated by Zifan Wang ("Lingerlet," "we," "us," or "our"). You're contracting with Zifan Wang when you use the Service.

Your relationship with Lingerlet

These terms help define the relationship between you and Lingerlet. When we speak of “Lingerlet,” “we,” “us,” and “our,” we mean Zifan Wang operating the Lingerlet personal project. Broadly speaking, we give you permission to access and use the Service if you agree to follow these terms.

By using the Service — including formatting or exporting a letter without signing in, or signing in to use optional sharing features — you acknowledge that you have read, understood, and agree to be bound by these Terms and our Privacy Policy.

Age requirements

The Service is not intended for individuals under the age of 17. By using the Service (including by signing in), you represent that you are at least 17 years old (or the higher minimum age required in your jurisdiction, if any) and have the legal capacity to enter into these terms.

The Service

Lingerlet is a letter formatting service that presents text in a way that mimics the look of physical letters in a digital or web environment — for example handwritten-style fonts, letter-paper backgrounds, and letter-sized pages. These are features of the Service only; they are not physical stationery or postage, and the Service is not a postal or email delivery service.

You may type or paste letter content into the Service and export the formatted letter as a PDF without creating an account or signing in. Formatting and PDF export do not require a Lingerlet account.

Optionally, and only if you choose to use them, Lingerlet may offer methods to share formatted letter content with others — including, for example, a shareable link. Sharing features may require sign-in and may be subject to additional rules described elsewhere in these Terms or in the Service.

Your role when using a sharing feature may differ:

• As a user who creates or generates a shareable link (or other share method): You choose whether to share, and you are responsible for sending the link or other share material to the intended recipient. Lingerlet does not send that link or letter to the recipient for you. Creating a share does not give you an outbox of shared letter bodies through the Service.
• As a user who opens or views letter content through a shareable link (or other share method): Access may require sign-in and may be limited to the intended recipient under the Service’s rules. Viewing does not create a permanent mailbox for you unless the Service expressly provides one.

The Service does not provide read receipts for shared letter content.

Sign-in, free use, and limits

Access to the Service is currently free. There is no subscription fee and no in-app checkout for storage or other digital items.

Formatting letter content and exporting a PDF do not require sign-in. Sign-in is required when you use certain optional sharing features — in particular, when you create a shareable link, and when you open or view letter content through a shareable link as the intended recipient (or when another share method the Service offers requires sign-in).

Where sign-in is required, you may sign in using a third-party authentication provider we support, such as Google. We use sign-in to identify you for those features — for example, to associate a shareable link you create with your signed-in identity, to limit how often you may create shareable links, and to allow only the intended recipient to open shared letter content.

You are responsible for taking reasonable steps to keep your sign-in provider account secure. We do not control your third-party sign-in provider and cannot reset that provider’s credentials or secure that provider account on your behalf. Except where required by law, Lingerlet is not liable for unauthorized access to or use of your signed-in access to the Service.

We impose and may change usage limits to protect the Service and other users. In particular, we limit how many shareable links you may create over a period of time. The then-current limits may be shown in the Service. Exceeding a limit may prevent the related action until you wait or otherwise comply with those rules. Limits may change over time as described in Changes to the Service.

User Content

“User Content” means content you create, enter, paste, submit, or store in connection with the Service — including letter text and related formatting choices (such as paper style and font style) — and any other materials you provide through the Service.

These Terms do not transfer ownership of your User Content to Lingerlet. Lingerlet does not claim ownership of your letter text. These Terms do not decide ownership or other rights as between you and another person.

You are responsible for your User Content and represent that you have the rights needed to provide it and that it is lawful.

Even though Lingerlet does not claim ownership of your User Content, we may remove, restrict, or disable access to User Content, or suspend or terminate signed-in access, when we believe it is appropriate — for example, after a spam or abuse report, a copyright or other rights complaint, a report that the Service is used by someone under the minimum age, or other violations of these Terms. Ownership of the content does not limit our ability to take those actions for the Service.

Where your content lives

Unless you use an optional sharing feature, letter content you type or paste for formatting and PDF export is processed in your browser for that purpose. Lingerlet does not need a server-side copy of that content solely for formatting or PDF export.

The Service may also offer an optional keep a copy in this browser (or similar) feature. If you turn it on, a copy of your draft letter content and related formatting choices may be stored in your browser (for example in local storage) on that device and browser profile so you can return to it later. That copy stays under your control on that device; it is not a Lingerlet server mailbox, is not synced across devices or browser profiles by Lingerlet, and turning the feature off or clearing browser storage may delete it. Details shown in the Service control how this feature works.

Sharing and the license you grant

If you create a shareable link (or use another sharing method the Service offers), you ask Lingerlet to store and make available a snapshot of the letter content and related formatting as of the time you create the share. Later edits you make in the draft editor do not change a share already created.

By creating a shareable link or otherwise submitting User Content for sharing through the Service, you grant Lingerlet a limited, non-exclusive, worldwide, royalty-free license to host, store, process, transmit, and display that User Content solely as needed to provide the sharing feature — for example, to store the snapshot, to make it viewable to the intended recipient when the Service’s rules allow, and to allow that recipient to view or export it (such as as a PDF) under the Service’s rules. This license is not a transfer of ownership to Lingerlet.

Delayed viewing. Shared letter content is not immediately viewable when you create a shareable link. The Service applies a delayed-delivery window so that content becomes viewable to the intended recipient only after a delivery time set when the link is created. For shareable links, that delivery time is generally on the third calendar day after creation, counting the day you create the link as day 1 (for example, a link created on Friday becomes viewable on Sunday), at a time of day chosen by the Service within a daytime window, using the timezone you provide when creating the link. Exact timing is approximate and not guaranteed. Before that delivery time, the intended recipient who opens the link may be told when the letter arrives, but will not see the letter content.

Deletion after delivery. Shared letter content and the shareable link are not kept indefinitely. After the content becomes viewable (that is, after the delivery time), we delete it from our systems about 90 days later. Once deleted, the link will no longer show the letter content. Recipients who want a lasting copy should export or save the letter (for example as a PDF) while it is still available. We may change retention periods over time as described in Changes to the Service; the then-current behavior may also be described in the Service.

As the creator of a share, you do not receive an outbox of shared letter bodies through the Service. The intended recipient may keep, read, export, or otherwise use the copy made available to them under the Service’s rules — similar in spirit to a letter they have already received — even if you later change how you use the Service or end your signed-in access.

This license ends when the applicable shared User Content is permanently deleted from our systems under the rules above (or earlier if we remove it for another reason permitted by these Terms). Until then, we may continue to host and process it as needed to provide the sharing feature. Even after the license ends, we may retain copies where required for legal, security, or similar legitimate purposes.

Content restrictions

We may apply and enforce technical and other restrictions on User Content at our discretion, including limits shown in the Service or these Terms. For letter text, those restrictions may include (without limitation) character or length limits — including when you create a shareable link — and we may reject or prevent sharing text that exceeds those limits. If the Service later allows attachments or other media, we may impose additional restrictions (such as format, size, or dimensions) and may reject content that does not meet them. These content restrictions are in addition to the usage limits described above and may change over time as described in Changes to the Service.

Prohibited use

You agree not to, and will not assist others to:

• Use the Service for any unlawful purpose, or to create, share, or store illegal content
• Create, share, or store content that infringes copyrights, trademarks, or other intellectual property rights, or that you do not have the right to share or distribute
• Create, share, or store sexual content involving minors, non-consensual intimate images, or other illegal sexual content; or content (including images, if the Service allows them) that is pornographic or that depicts extreme violence. We may also remove or restrict other content we reasonably consider highly offensive or harmful to users or the Service
• Harass, threaten, abuse, or harm others
• Spread rumors or known fake news — that is, create or share knowingly false or rumor-spreading content meant to mislead
• Engage in fraud, scams, phishing, or other deceptive schemes
• Deceptively impersonate another person or Lingerlet, or pretend to be someone else in order to mislead others
• Abuse rate limits, free allowances, or other usage limits, or attempt to circumvent them
• Social-engineer or pressure others into sending money, credentials, or sensitive information
• Use shareable links or other sharing features to send spam, bulk unsolicited messages, or commercial solicitation not permitted by us
• Scrape, crawl, or systematically extract data from the Service
• Interfere with, disrupt, or attempt to gain unauthorized access to the Service or its systems
• Access another user’s signed-in access or shared letter content without authorization

We may suspend or terminate access for violations of the prohibited-use rules above (such as unlawful use, infringement, prohibited sexual or violent content, harassment, knowingly false or rumor-spreading content meant to mislead, fraud, impersonation, spam, scraping, interference, or unauthorized access).

Ordinary personal letters — for example everyday news, feelings, or stories shared with friends or family — are expected. That is not what this restriction covers.

Do not put high-risk or highly sensitive information in letter content — even in letters shared with friends or family — including, but not limited to:

• Passport numbers, social security numbers, green card numbers, or driver’s license numbers
• Real-world physical addresses
• Financial information, such as bank account numbers or credit or debit card details
• Business or trade secrets
• Passwords
• Access tokens

If you include such high-risk information anyway, you do so at your own risk. Lingerlet is not responsible for any damage or loss arising from that information — for example, if a recipient shares or leaks it, if someone else sees it while you are typing or using the Service, or if the Service or a related system is compromised.

Termination and suspension

We may suspend, restrict, or terminate your signed-in access to the Service, or remove User Content, if you violate these Terms, if we receive a report or complaint (including spam, abuse, copyright or other rights issues, or that the Service is used by someone under the minimum age), or if we believe your conduct or content may harm the Service or other users. For example, we may prevent you from creating further shareable links while still allowing other uses of the Service, or we may disable access to a particular shared letter. We may take these actions without notice where appropriate, and without liability to Lingerlet. Where reasonably possible, we will provide notice.

The Service does not currently offer in-app account deletion. Signing out ends your session on that device; it does not by itself delete shared letter content from our systems. If you need help with access or a content concern, contact us at support@lingerlet.com.

Shared content is deleted about 90 days after it becomes viewable. As described in User Content, after a shareable link’s delayed delivery time (when the letter content becomes viewable to the intended recipient), we delete that shared letter content and the link from our systems about 90 days later. That deletion happens under the Service’s retention rules whether or not you remain signed in. Once deleted, the content is no longer available through the Service. Export or save anything you want to keep (for example as a PDF) while it is still available. Browser-only copies (such as an optional keep-a-copy draft) are under your control on your device and are not the same as server-side shared content.

We may also remove shared content earlier when these Terms allow (for example, for a prohibited-use violation). If we keep limited technical or security logs after content or access is removed, those are retained only for the periods described in our Privacy Policy and then deleted or de-identified.

Disclaimers

To the maximum extent permitted by law, the Service is provided “as is” and “as available.” Lingerlet makes no warranties regarding the Service, including its accuracy, reliability, completeness, availability, or suitability for any particular purpose. We do not warrant that the Service will be uninterrupted, error-free, or secure; that formatting or PDF export will match any particular appearance on every device or printer; or that shared letter content will become viewable successfully or at any particular time. Delayed viewing and delivery timing for shareable links are approximate and not guaranteed, as described in User Content. Sign-in depends on third-party authentication providers (such as Google), which we do not control.

The Service is not a backup or archival service. Shared letter content is deleted about 90 days after it becomes viewable, as described in User Content and Termination and suspension. Browser-only drafts and PDFs you export are your responsibility. Keep your own copies of anything important.

To the maximum extent permitted by law, Lingerlet is not liable for delays, failures, interruption, or unavailability of the Service caused by events beyond our reasonable control, including natural disasters, war, riots, government actions, widespread internet or infrastructure outages, malware, hacking, or other attacks beyond our reasonable control, failures of third-party systems we rely on (including authentication providers), or scheduled or emergency maintenance.

Limitation of liability

To the maximum extent permitted by law, Lingerlet is not liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss of profits, data, content, goodwill, or other intangible losses, arising from or related to (a) your access to or use of, or inability to access or use, the Service; (b) any conduct or content of any other user or third party; (c) unauthorized access to, use of, or alteration of your letter content or other content; (d) failure or inability to sign in or sign out, including failures of a third-party authentication provider; (e) failure or inability to create, generate, copy, open, or use a shareable link or other sharing method; (f) shared letter content that is delayed, not viewable when expected, inaccessible to an intended recipient, removed, or deleted under the Service’s retention rules (including about 90 days after the content becomes viewable); or (g) loss of browser-only drafts or failure to export or save a PDF.

Because the Service is currently provided free of charge, to the maximum extent permitted by law Lingerlet’s total aggregate liability for direct damages arising from or related to the Service will not exceed fifty U.S. dollars (US $50).

Indemnification

To the maximum extent permitted by law, you agree to indemnify and hold harmless Zifan Wang (operating as Lingerlet) from any claims, liabilities, damages, losses, or expenses (including reasonable attorneys’ fees) arising out of or related to your User Content, your use of the Service, or your violation of these Terms.

Governing law

These Terms are governed by the laws of the State of California, without regard to its conflict-of-law rules. You agree to submit to the exclusive jurisdiction of the state and federal courts located in California for any disputes arising out of these Terms.

Changes to the Service

As Lingerlet and the user experience evolve, we may from time to time:

• add, change, or remove features or parts of the Service (for example, paper styles, fonts, PDF export behavior, browser keep-a-copy, or sharing methods);
• change how sharing works, including delayed viewing windows, who may open a shareable link, supported sign-in providers, or recipient rules;
• change usage limits or capacity (for example, how many shareable links you may create over a period of time, or character limits for shared letter content);
• change retention or deletion periods for shared letter content (including the about-90-day period after content becomes viewable);
• introduce optional paid features or change how access is offered in the future; and/or
• suspend, discontinue, or terminate the Service altogether.

Where reasonably practical, we will provide notice of material changes. Continued use of the Service after a change means you accept the updated Service as then offered, subject to these Terms and applicable law. If we later offer paid features, additional payment terms may apply to those features.

Changes to these Terms

We may revise these Terms from time to time. We will post the revised Terms and update the Last Updated date. Continued use of the Service after a posted change constitutes acceptance of the updated Terms.

Entire agreement

To the extent permitted by applicable law, these Terms and our Privacy Policy set out the entire agreement between you and Lingerlet regarding the Service, and replace any prior understandings or agreements relating to the Service. You agree that you will have no claim against Lingerlet for any statement not explicitly set out in these Terms or the Privacy Policy. The words “include” and “including” mean “including without limitation.”

Severability; waiver

If any provision of these Terms (or any part of a provision) is held invalid or unenforceable, the remaining provisions (and the remaining part of that provision) will continue in full force and effect. If a court holds that we cannot enforce any part of these Terms as written, we may replace that part with similar terms to the extent enforceable under applicable law, without changing the rest of these Terms. Our failure or delay in enforcing any provision of these Terms is not a waiver of our rights under that provision.

Contact us

If you have questions about these Terms or need to contact us about the Service (including security issues, copyright or other rights complaints, sign-in or access problems, or shared-content concerns), please email:

Zifan Wang (operating Lingerlet)
support@lingerlet.com