Choose a familiar frame.
Go back to classic Windows or keep it clean with an iOS alert. Try light, dark or a phone-screen view.
Error Message
Mockup Generator.
A familiar popup. An unexpected message.
Make people pause, smile or think.
- Classic Windows, XP & iOS
- Free PNG & JPG up to 3×
- No account or watermark
Keep an editable copy on your device. How it works
A FEW WAYS TO MAKE IT YOURS
Error message mockup examples.
A little inspiration to start.
An idea that will not load. A little reminder. An announcement with a twist. Choose a starting point and make the words your own.
Classic Windows · Square
When the best idea is probably offline
A familiar error with a friendly twist. Make a retro meme, a creative reminder or a playful brand post.
XP blue · Fit to dialog
Out-of-office mode, activated
A nostalgic announcement for a studio, shop or team. Replace the message and make the button labels part of the joke.
iOS Light · Square
A useful prompt, without the pressure
Preview a reminder prompt or use the alert as a gentle call to action. Keep the message short and give people a clear choice.
iOS Dark · Phone screen · Story
A quieter moment in the scroll
A dark iPhone-style alert for a Story or product concept. Try a different message, change the action labels or hide the phone frame.
XP blue · Portrait
A campaign with a little urgency
An alert-style promotional graphic for a collection, event or closing date. Make the offer and its next step your own.
Classic Windows · Widescreen
Save the good parts. Try again tomorrow.
A three-button dialog for a thoughtful post or presentation. Customize the question, icon and actions together.
Made with this tool. Every example includes editable messages, buttons and styling.
SOMETHING WORTH A SECOND LOOK
A small interruption.
A good idea.
Give it your own voice.
Write the message, choose an icon and turn each button into part of the story.
Take it to your next post.
Download a free PNG or JPG. Use a transparent canvas to place the dialog over your own creative.
A FEW USEFUL DETAILS
Before you
make it yours.
How do I make an error message mockup?
Choose a Windows or iOS style, write your message and change the button labels. You can type in the sidebar or click text directly in the preview. Pick a canvas format, then download your image.
Is the error message generator free?
Yes. All current editing features and PNG or JPG downloads at 1×, 2× and 3× are free. No account, subscription or watermark. The download controls show the exact pixel dimensions for your design. Very large designs may need a smaller size to fit your browser’s image limits.
Can I make a classic Windows error message or an XP popup?
Yes. Classic Windows uses a silver dialog, navy title bar, raised buttons and a focus outline. XP blue adds a blue title bar and softer controls. Choose an error, warning, information, question or success icon, or remove the icon entirely.
Can I make an iPhone or iOS alert mockup?
Choose iOS Light or iOS Dark. Both have a rounded alert, centered text and familiar action rows. Use Dialog only for a standalone popup, or Phone screen to show it over a dimmed wallpaper with a status bar.
Can I customize the buttons?
Use one, two or three buttons, each with its own label. Choose Primary, Regular, Destructive or Disabled styling. Place buttons side by side or stack them. Automatic layout stacks labels when they need more space. The buttons are part of the exported image.
What can I use these popup images for?
Try retro error memes, playful social media posts, campaign announcements, product concepts, onboarding mockups, reminders and presentation slides. The examples below include editable starting points for each style.
Can I download a transparent error message PNG?
Yes. In Background & export, enable Transparent canvas and choose PNG. For an isolated iOS alert, also select Dialog only. You can then place the popup over a photo, slide or video. JPG does not support transparency.
Can I make square posts, Stories and widescreen images?
Yes. Square is 1080 × 1080, Portrait is 1080 × 1350, Story is 1080 × 1920 and Wide is 1920 × 1080 at standard resolution. The presets also adjust dialog width and message size. Fit to dialog follows the content. Free 2× and 3× downloads add more pixels.
Does this display a real system error on my computer?
No. This creates a mockup image in your browser. It does not trigger operating-system alerts, run commands or change device settings. Your content stays on your device.
Can I save a project or use content from an AI assistant?
Yes. Save project downloads an editable file with your settings, text and uploaded images. Open project restores it in the same tool, or lets you paste project JSON from an assistant. Review it before replacing your draft. Files are processed in your browser, not uploaded to your account.
Can I use the downloaded images commercially?
Yes. Images exported from these social and app mockup tools can be used in personal projects, social posts, presentations and client work without a Mockaps subscription or attribution. You still need permission for content you add. Platform names and logos belong to their owners; a mockup does not imply their endorsement.
An independent mockup tool by Mockaps. Windows and iOS belong to their respective owners. This tool is not affiliated with or endorsed by Microsoft or Apple.