Blast any screen back to the broadcast era with vivid SMPTE color bars, glitchy scanlines, and bold “NO SIGNAL” overlays.
The color stripes, PLUGE bars, and alignment grids match genuine test cards.
The pattern includes luminance stripes, audio reference tone indicators, and rotating labels. Scanlines gently drift, while a faint CRT curvature gives the image depth. Toggle between multiple standards: SMPTE, EBU, Philips PM5544, or custom corporate palettes.
Swap between color bars, grayscale ramps, and geometry grids.
Enable a steady 1 kHz sine wave—instant broadcast authenticity.
Add phosphor glow, noise, and horizontal jitter with a single toggle.
Replace “NO SIGNAL” with “Please Stand By,” “Broadcast Paused,” or inside jokes.
Display it on projectors before a DJ set; everyone thinks the venue’s AV team is prepping.
Use it for establishing shots or to cover real monitors during downtime.
Turn on the test pattern when roommates monopolize the TV.
Teach broadcasting history with an accurate interactive reference.
Enable F11 to hide browser UI and mimic a native HDMI signal.
Route the reference tone through speakers so the room hears the iconic beep.
Toggle glitch mode briefly so people think the satellite feed died.
Calmly say, “We’re experiencing technical difficulties,” to sell it.
Fade back to the show and bask in the applause (or groans).
Test patterns were calibration tools. Engineers used them to align color guns, check audio channels, and ensure transmitters were live. By recreating them precisely, you get instant credibility.
Share trivia as the bars glow: why engineers used PLUGE strips, how midnight sign-offs worked, or why the high-pitched tone sat at 1 kHz. Friends suddenly feel like they’re inside a late-night broadcast lab.
Create bingo cards with events like “Somebody checks HDMI cable,” “Someone hums the tone,” “Viewer takes photo.” First person to fill a row wins bragging rights.
Turn the pattern into a mini lesson: explain how test cards ensure color accuracy, then invite students to adjust camera white balance using the live display. Pair it with worksheets where they sketch the layout from memory—great for media literacy units.
Set up a tripod in front of the screen and let guests pose as if they’re starring in a glitchy music video. Encourage props like vintage camcorders or headset mics. The resulting photos look like album covers, and everyone remembers the “technical difficulty lounge.”
Place a folding table with sliders labeled “Hue,” “Contrast,” and “Signal Strength.” Let visitors pretend they’re broadcast engineers trying to stabilize the feed. Every tweak corresponds to actual on-screen controls, teaching color theory disguised as mischief.
Write a short “breaking news” script and rehearse it in front of the test pattern. One person plays the anchor apologizing for technical issues, another plays the studio engineer shouting status updates, and a third pretends to be the network executive calling from a rotary phone prop. The pattern becomes a theatrical backdrop, not just a static image.
Set up paint chips or RGB LED strips that match each bar. Challenge friends to mix paints or dial LED values until they match the screen. Explain why each bar exists (luminance sweeps, skin tone references, chroma bursts) so the prank doubles as a hands-on calibration workshop.
Frame still images of different test patterns and hang them around the activation. As the live screen flickers, visitors compare the printed references and learn how each broadcaster customized their card.
Set up a ring light and encourage people to record “technical difficulty” TikToks. Provide cue cards with sample scripts so even shy guests can riff about the phantom outage.
Keep a clipboard noting fake interventions: swapped coax cables, rebooted uplink dish, appeased gremlins with snacks. Reading the log at the end becomes part of the punchline.
Print graph paper sheets with columns for “Time,” “Color Shift,” “Audio Quirk,” and “Suspected Cause.” Every time the bars flicker or the tone wobbles, have someone jot a theory. Comparing notes afterward turns the prank into collaborative detective work and gives you quotable lines for social posts.
Set up a group chat titled “Station Affiliates” and have remote friends share matching photos of their own screens running the test pattern. Pretend you’re coordinating a regional outage response. Seeing the same bars in multiple locations makes the prank feel like a continent-wide broadcast hiccup.
Use the test pattern to entertain, not to sabotage important broadcasts. Keep the joke short, then hand control back to the actual show.
Create hilarious moments with friends and family. Pull off the ultimate prank and watch their reactions unfold in real-time.
Break the ice at the office with light-hearted pranks. Perfect for team building and creating a fun work environment.
Showcase impressive visual effects and technical knowledge. Ideal for presentations, demos, and educational purposes.
Use pranks as part of games, stories, or creative projects. Perfect for content creators and game developers.
Add an unexpected twist to parties and events. Create unforgettable experiences and entertainment value.
Explore web development and creative coding. Perfect for developers wanting to learn new techniques.
Follow these simple steps to pull off the perfect prank
Browse our collection of pranks and select the one that matches your target's interests. From fake updates to hacker simulators, pick what fits best!
Open the prank on your friend's computer, phone, or tablet. You can either hand them your device or get them to open it themselves for maximum surprise.
Let the prank do its work! The realistic effects and authentic look will make them believe what they're seeing. Capture their reaction for the memories!
Once they're sufficiently pranked, reveal that it's all fake! Press ESC or close the page to show them it was just a harmless joke. Laugh together!
Share the prank with your friends! Whether it's a video of their reaction, a screenshot, or just telling the story - these moments make the best memories.
Try different pranks! Each one offers a unique experience. Mix and match to keep things fresh and create endless entertainment.