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Features

Danmaku Handheld is a free browser tool that turns any Chinese, English, or emoji text into a horizontally scrolling LED-style marquee you can hold up on your phone like a portable light sign at concerts, fan meetups, airport pickups, or clubs. Pick text color, font size, scroll speed, background, toggle full-screen, and turn phone brightness to maximum — no app install, no account registration.

When You Need This

Common pain points this tool solves

1. At a K-pop, C-pop concert or outdoor music festival, front-row fans hold up phones showing idol names, slogans, and official fan colors as a low-cost alternative to dedicated physical LED light sticks
2. Picking someone up at the airport or train station: display their name plus flight or train number in a large high-contrast yellow-on-black marquee so they can spot you far away without a paper sign that blows away
3. At clubs, murder-mystery parties, or team-building icebreakers, send interactive lines to friends' phones as scrolling text for atmosphere instead of printed paper cards.

How to Use

Step-by-step instructions

1. Type the text to show in the top input. Chinese, English, numbers, and emoji can be freely mixed. Keep each line under a few dozen characters; split very long slogans into multiple paragraphs.
2. Pick text and background colors. Use fan colors for concerts, high-contrast yellow on black for airports, neon hues for clubs.
3. Use sliders to tune font size and scroll speed. For distant concert visibility use max size and slow speed; for crowded airport pickup use medium settings. The preview updates in real time.
4. Press full-screen to hide browser chrome, turn the phone horizontally, and set brightness to maximum. For very long displays plug in a charger and turn off auto screen lock.

Why Choose Korelyy

What makes us better

1. True full-screen horizontal LED-style scrolling on phones, tablets, and desktops with no address bar or buttons visible on stage — visually reads like a dedicated LED sign, not a random phone screen.
2. Fine-grained controls: font size, speed, weight, letter spacing, direction, solid or gradient background, blink mode — one tool covers concerts, pickups, clubs, weddings, and playful use cases.
3. 100% browser-local, no install, no signup, no location or camera permissions. Works offline after first page load, which is safer at security-checked large event venues.

Monetize With This Tool

Turn this tool into a side income stream

1. Use this tool to speed up your freelance work and take on more paying clients
2. Create polished content faster for your blog, YouTube channel, or social media and grow your audience
3. Offer this tool's capabilities as a service on Fiverr, Upwork, or to your local business clients

Frequently Asked Questions

1. Will it work at venues with no mobile signal?

   Yes. Every rendering step runs in client-side JavaScript; there are zero backend API calls. Open the page once while on Wi-Fi, and it keeps working in flight mode or dead zones. Preload the page before leaving home to be safe.

2. Can leaving my phone at max brightness cause OLED burn-in?

   Normal LCD phones are usually fine. If you have an OLED or AMOLED phone (Samsung, many Chinese flagships), leaving a static bright line for many hours does carry mild burn-in risk. Turn the screen off for 10 seconds every 2 minutes, or turn on the built-in anti-burn slow-drift mode that shifts text slightly over time.

3. Can I show two lines or mix flags and emoji with text?

   Yes. Press Enter in the input to create multi-line text. All Unicode emoji, flags, hearts, stars, and custom glyphs render normally. Chinese combined with idol names plus emoji is a fan favorite for high on-stage readability.

4. Can I export it as a GIF or video for social media?

   This version focuses on live handheld display. For social posts, use your phone's built-in screen recorder and capture 10 seconds of the full-screen scroll; it preserves all the colors and speed tuning you configured.

5. Can the background be transparent for compositing over photos as a sticker?

   Yes. Flip background to transparent mode and only the text layer renders. You can then use browser devtools to screenshot a clean text PNG or layer it on other assets. Opaque solid colors read better at live events, but transparency is excellent for secondary design work.