How to fix mobile responsiveness in Base44 apps

Reproduce the problem at useful widths

Start with the exact page and action that feels squished. Test a small phone, a larger phone, a tablet-sized width, and desktop. Rotate the phone once as well. Record where content first overflows, becomes unreadable, or hides an important action.

Use Base44's mobile view for quick iteration, then verify the published app in a real mobile browser. A design preview can reveal layout issues, but the final test must include actual navigation, keyboard behavior, scrolling, forms, and account permissions.

• No page creates unexplained horizontal scrolling
• Primary actions remain visible and easy to tap
• Text is readable without zooming
• Forms still work when the keyboard is open
• Menus, modals, and tables can be used with one screen width

Replace fixed widths with flexible containers

The most common cause of a squished layout is a desktop container, card, image, or control with a fixed width or large minimum width. On narrow screens, the browser either overflows the page or compresses neighboring elements until they become unusable.

Use containers that can shrink to the available width, keep sensible side padding, and cap wide content with a maximum width. Images and media should stay inside their parent. Long email addresses, URLs, labels, and generated text need safe wrapping rules.

Turn desktop columns into a mobile sequence

A three-column dashboard rarely needs three columns on a phone. Decide the reading and action order, then stack the cards or change the grid as the screen narrows. The most important status or action should appear before secondary metrics and supporting details.

For sidebars, choose between a collapsible menu, a top navigation control, or a drawer. Do not leave a narrow permanent sidebar beside an already narrow content area. Sticky elements also need review because they can cover too much of a mobile viewport.

• Cards stack in a deliberate order
• Side navigation has a usable mobile pattern
• Sticky headers do not cover page content
• Buttons do not compete in a single cramped row
• Spacing becomes smaller without disappearing

Make forms comfortable with the mobile keyboard

Form fields should normally use the available width, keep readable labels, and provide enough vertical space between actions. Choose the correct input type so phones can show an appropriate keyboard for email, phone, number, date, or URL fields.

Avoid placing Save and Cancel in a row that becomes too narrow. Error text must wrap and remain connected to its field. Test the final fields near the bottom of the page while the keyboard is open, especially inside a modal or drawer.

Give tables and dense admin screens a mobile strategy

A wide admin table cannot always be compressed into a readable phone width. Keep the most important columns visible and move secondary information into a detail view, expandable row, or card layout. If horizontal scrolling is genuinely necessary, make the scroll area obvious and keep essential actions reachable.

Filters should wrap or move into a compact panel. Pagination, search, bulk actions, and row menus need touch-friendly targets and enough spacing to avoid accidental taps.

Review modals, images, and touch targets

A modal should fit within the visible screen, allow its content to scroll, and keep its close action available. Large images need responsive sizing and a useful crop rather than forcing the page wider. Menus and tooltips should not depend only on hover because phones do not have a mouse pointer.

Buttons and icon actions need enough size and separation for touch. Make the entire intended control interactive, provide a visible focus state, and keep destructive actions away from common navigation taps.

Test the complete flow before publishing

Responsive work is complete when the real task works, not when one screenshot looks neat. Test sign-up, navigation, forms, uploads, search, payments, messaging, and any admin action that matters to the product.

Publish the updated version, open it in a private mobile browser, and repeat the priority journey. Then check a second width to catch rules that only work for one phone size.

• No important route overflows horizontally
• Navigation opens, closes, and reaches every key page
• Forms can be completed and submitted on a phone
• Dialogs and menus stay inside the viewport
• The public app matches the corrected design