How to send an HTML page on LINE so it opens in one tap

You made a page with ChatGPT, Claude, or Gemini: a quiz for your class, a menu for your shop, a trip plan, a small game. Your friends are on LINE, and they'll open it on their phones.

LINE can carry the file. Its help doesn't say what the other phone does with it, and LINE keeps the file for a limited time. This guide shows what LINE's help does say, and how to send a link that opens as the page instead. Every LINE fact here comes from LINE's English help, read on November 7, 2026.

Can you send an HTML file on LINE?

LINE sends files saved on your phone. Its help on sending messages gives the steps under “Documents or audio files”:

1. Open the chat and tap the plus icon at the bottom of the chat.
2. Tap File.
3. Tap the .html file, then tap Send or OK.

On a computer, drag the file into the chat, check the Send files preview window, and click Send. You can also click the Send file icon at the bottom of the chat, select the file, and click Open. LINE's steps for Windows and Mac add: “If the file type you are sending is not supported, you can send it as a zip file.”

LINE's English help doesn't list the file types it takes, so it doesn't say an .html file is one of them. It gives no size limit for a file sent in a chat.

How long LINE keeps the file

Not for good. LINE's Keep Memo help says: “Photos, videos, and other files sent in chats (including Keep Memo) are only saved on our servers for a certain amount of time.” After that, “you will not be able to view, download, or send/receive the relevant content.” LINE doesn't give the time: “We cannot disclose how long files are stored on our servers.”

Why the HTML file doesn't open as a page

An HTML file is a set of instructions for a browser, not a picture of the page. Sent alone in a chat, it can lose what it needs to run.

• LINE doesn't say which app opens it. Its help doesn't say whether LINE shows a received .html file itself or hands it to another app on the phone.
• A phone's file preview isn't a browser. A preview can show the text and run none of the page's JavaScript, so buttons, quizzes, and games do nothing.
• Files the page loads by name stay behind. If the page keeps its styles in style.css or its pictures in photo.png, LINE sends only the file you picked.
• The file can expire. Once LINE's storage period ends, your friend can't download it.

A link sends the page's address instead, so there's no file to open or to expire. A browser opens it as a page, and step 1 below puts the CSS and pictures into the page, so nothing stays behind.

What your friend sees on iPhone and Android

LINE's help doesn't say how LINE on iPhone or Android opens an .html file. Its help on content in chats lists the files a chat holds (the menu icon, then Photos & videos, then Files), and names 3 options beside each one: Share, Send to Keep Memo, and Jump to message. On a computer, it says: “Click a file to save it to your PC.”

Here is what a phone does with an .html file once it's saved, from our own tests:

• iPhone. Apple's Files help says: “If you haven’t installed the app that created a file, a preview of the file opens in Quick Look.” We saved .html files in Files on iOS 26.3 in Apple's iPhone Simulator on October 6, 2026, and tapped them. Quick Look showed the text and the CSS inside the file. It ran no JavaScript and loaded nothing from the web, so https:// images, Google Fonts, and Tailwind from a CDN were missing.
• Android. In our test on Android 16 in Google's Android Emulator on October 21 and 22, 2026, tapping a saved .html file in the Files app offered Chrome and HTML Viewer. HTML Viewer ran no JavaScript. Chrome ran the whole page, at a content:// address that only works on that phone.
• Separate files. In our Chromium test on October 13, 2026, a page copied alone lost its separate CSS, image, and script. Only the CSS written inside the .html file still applied.

We didn't test LINE itself on a phone. A quiz or a game can look finished in a preview and do nothing when tapped.

What happens when they tap a link

The page opens in a browser. For a chat's Links list, LINE's help says: “Tap a link to go to that website.” LINE has its own in-app browser; its help describes a web page open in the LINE app. On iPhone, LINE Labs has a setting, Open links in your default browser, which opens chat links “with the browser you've configured on your device (e.g. Safari, Chrome),” per LINE's help on that setting. LINE's LINE Labs page lists it among the features “only available on iOS devices.”

File or link: what your friend gets

Send an HTML page on LINE as a link in 4 steps

The upload box at the top of this page turns your file into a link. To compare it with Netlify Drop, GitHub Pages, and other hosts, read How to share an HTML file as a link.

1. Put the page in one file

Convika accepts one .html or .htm file up to 2 MB, or code pasted into the box. If the page uses a separate CSS file or pictures from your computer, ask the AI that wrote it: “Give me the whole page as one HTML file, with the CSS inline and full https:// links for images.”

2. Drop the file or paste the code

Drag your file into the box at the top of this page or tap Choose a file and pick it on your phone, or select Paste code and paste the code. On a phone, copy everything from the chat with ChatGPT, Claude, or Gemini, from the first line to the closing </html>. Click Get my preview link. You don't need an account or an email address. If the code still points to files on your computer, the box lists them so you can fix those first.

3. Check the preview on your own phone

When you see “Your preview is ready,” click Copy link and open it on your phone. Check the layout, the text size, and the images. The preview is for checking only: it works for 3 minutes, search engines are told not to index it, and its scripts and forms are off, so buttons and quizzes don't respond yet. Don't send this link to the chat.

4. Keep the page, publish it, and paste the address into LINE

Click Keep this page — free, no card and sign up. The page moves into your account as you uploaded it, with its scripts running, and the preview link stops working. Click Publish page, choose Public under Who can open this page?, and click Next. The first time, click Publish free. The page goes live with the small Convika bar at the bottom, at an address that stays the same when you publish a changed version. Copy that address, paste it into the LINE chat, and send it. Your friend taps it and the page opens, without a Convika account.

Sending the link to a LINE group

One link works for everyone in the group, and for anyone they share it with. LINE keeps every link sent in a chat in one list, its help says: at the top of the chat, tap the menu icon, then Photos & videos, then Links. Anyone who scrolled past your message can find the link there.

Under Who can open this page?, the free choice is Public: anyone with the link can open the page, and it may show up in search results and in Convika's gallery. To keep it out of both, choose Private link (Pro) when you publish. Anyone with a private link can still open it, without a password or account.

• Leave out personal details. Don't put names, phone numbers, or home addresses on a page you share in a group.
• A password needs Pro. Choose Only people with the password when you publish. Visitors see a password screen first. A page password comes with Pro ($12 a month). Send the password in a separate message. See How to password protect an HTML page.
• See how many opened it, not who. Once the page is published, the dashboard counts page views and shows each visitor's country and device over the last 90 days. To collect answers or sign-ups from the group, click Add a form to my page.

Free includes 10,000 page views a month across your pages. Pricing says what happens past that.

Fix the page without sending a new link

Ask the AI for the changed page, then upload the new file on the page's own screen in the dashboard (Update from an HTML file) and publish it. The link already in the chat opens the new version, so nobody has to scroll for a new one. A file sent in the chat would need sending again, and the old copy would stay in the chat.

If you upload the new file from the dashboard's upload screen instead, it becomes a new page. When you publish it on Free, Convika may ask whether it's a new version of your live page: Update the live page (free) puts it at the same link.

When to send the file itself

Send the file when the other person needs the code: a developer who will change it, or a teacher who marks your HTML. They'll open it on a computer. Anyone who only needs to look at the page should get a link.

If someone sent you an HTML file on LINE

Ask the sender for a link. Don't open an .html file you weren't expecting; check with the sender first. LINE's help says you can “view and save shared content such as photos, videos, and files,” but names no Save option for a file on a phone: beside each file in a chat's Files list, it names Share, Send to Keep Memo, and Jump to message. On a computer, clicking the file saves it. Once a file you were expecting is saved, before LINE's storage period ends, open our free HTML viewer in Safari or Chrome. Tap Choose an .html file and pick it. If you're unsure about the file, turn off Run scripts before you choose it. The page runs in your browser, loads its scripts and web images, and your file isn't uploaded. Styles and pictures the sender kept in separate files still won't show. How to open an HTML file on iPhone and on Android have the steps from a saved file.

Frequently asked questions

Can you send an HTML file on LINE?

LINE sends files from the plus icon and File in a chat, but its English help doesn't list the file types it takes, so it doesn't say .html is one. For computers, it says to send a file type it doesn't support as a zip file. Your friend gets a file, not a live page. Send a link if they only need to see it.

Why can't my friend open the HTML file I sent on LINE?

Their phone opened it in something that isn't a browser, the page's CSS and images were in files that weren't sent, or the file passed LINE's storage period. LINE's help doesn't say how a phone opens an .html file. On iPhone, a saved file opened in Quick Look, which ran no JavaScript in our simulator test (iOS 26.3, October 6, 2026). Send a link instead.

How long do files stay on LINE?

LINE doesn't say. Its help says files sent in chats “are only saved on our servers for a certain amount of time,” and that after the storage period you can't view or download them. It adds: “We cannot disclose how long files are stored on our servers.” A link isn't a stored file, so LINE's storage period doesn't apply to it.

What is LINE's file size limit?

LINE's English help gives no size limit for files sent in a chat. Convika takes one HTML file up to 2 MB. Pictures written into the code make a file large fast, so use images at https:// addresses.

How do I open an HTML file someone sent me on LINE?

Ask the sender for a link first. If you saved the file, open the free HTML viewer in Safari or Chrome and tap Choose an .html file; it runs the page in your browser without uploading it. If you weren't expecting the file, ask the sender before you open it, and turn off Run scripts first.

How do I make LINE open links in Safari or Chrome?

On iPhone, tap the Home tab, then Settings, then LINE Labs, and turn on Open links in your default browser. LINE's help says it works only on your main device, typically your smartphone, and lists it among the features only available on iOS. It doesn't name a setting like it for Android.

How do I share an HTML page in a LINE group?

Publish the page and paste its link into the group chat. Everyone in the group opens the same page, and LINE's chat menu keeps the link under Photos & videos in the Links tab. When you fix the page, publish the new version and the same link opens it.

Sources

• Sending, sharing, copying, and editing messages (LINE Help Center) (read on November 7, 2026)
• About Keep Memo (LINE Help Center) (read on November 7, 2026)
• Editing/checking content such as photos and videos in chats (LINE Help Center) (read on November 7, 2026)
• [iPhone/iPad] Opening links in chats with your default browser (LINE Help Center) (read on November 7, 2026)
• About LINE Labs (LINE Help Center) (read on November 7, 2026)
• Using LINE with a web page open in the app (LINE Help Center) (read on November 7, 2026)
• Find and view files and folders in Files on iPhone (Apple) (read on November 7, 2026)