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O Backgrounds | Page 10

Browse 1,376+ O Backgrounds to download free for any screen

We keep 1,376 O Backgrounds on this page, and the list is still growing. It is a broad set, assembled to suit different tastes. Works in any app that accepts a still background image. Downloads are free and instant — there is nothing to sign up for.

Cracked golden zero symbol on black background — O Background
Rustic Letter O
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  • Silhouette of a person standing under glowing green lightning in a starry night sky. — O Background
    Silhouette of a person standing under glowing green lightning in a starry night sky.
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  • Chemistry study notes on graph paper with colored pens nearby. — O Background
    Chemistry study notes on graph paper with colored pens nearby.
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  • Three anime characters in combat with glowing energy effects and fiery background. — O Background
    Three anime characters in combat with glowing energy effects and fiery background.
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  • Two anime heroes battle with fire and ice powers. — O Background
    Two anime heroes battle with fire and ice powers.
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  • Three anime characters in bunny hoodies grin with determination. — O Background
    Three anime characters in bunny hoodies grin with determination.
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  • Anime hero shouting 'Don't touch her phone !!!' with explosive background. — O Background
    Anime hero shouting 'Don't touch her phone !!!' with explosive background.
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  • Anime characters in a high-energy battle scene with explosions and dramatic expressions. — O Background
    Anime characters in a high-energy battle scene with explosions and dramatic expressions.
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  • Anime character collage with hearts and romantic text in teal coral and peach tones. — O Background
    Anime character collage with hearts and romantic text in teal coral and peach tones.
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  • Nine anime characters in violent poses with text 'KILL THE SYMBOL OF PEACE' below. — O Background
    Nine anime characters in violent poses with text 'KILL THE SYMBOL OF PEACE' below.
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  • Group of anime superheroes in dynamic action poses with bright yellow background. — O Background
    Group of anime superheroes in dynamic action poses with bright yellow background.
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  • Anime heroes flying over a neon-lit city at night with glowing effects and dynamic poses. — O Background
    Anime heroes flying over a neon-lit city at night with glowing effects and dynamic poses.
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  • Anime character with spiky green hair and wide eyes repeated in a pattern. — O Background
    Anime character with spiky green hair and wide eyes repeated in a pattern.
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  • Four anime characters peeking over a fence with wanted posters below. — O Background
    Four anime characters peeking over a fence with wanted posters below.
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  • My Hero Academia anime characters in action poses with electric effects. — O Background
    My Hero Academia anime characters in action poses with electric effects.
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  • Five anime characters sitting in a row on a green background. — O Background
    Five anime characters sitting in a row on a green background.
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  • Anime character with green hair and eyes unleashing electric power through broken rock. — O Background
    Anime character with green hair and eyes unleashing electric power through broken rock.
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  • Anime characters in fantasy and modern gear posing together with varied expressions. — O Background
    Anime characters in fantasy and modern gear posing together with varied expressions.
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  • Anime heroes in action poses on city street with buildings and railings. — O Background
    Anime heroes in action poses on city street with buildings and railings.
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  • Anime heroes in school uniforms sprinting with determined expressions. — O Background
    Anime heroes in school uniforms sprinting with determined expressions.
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  • Young scientist surrounded by scientific equations and symbols with a lightbulb above. — O Background
    Young scientist surrounded by scientific equations and symbols with a lightbulb above.
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  • A dancer leaps in a studio as powder bursts around her in a glowing display. — O Background
    A dancer leaps in a studio as powder bursts around her in a glowing display.
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  • Two kids in lab coats watch a blue chemical reaction with amazed expressions. — O Background
    Two kids in lab coats watch a blue chemical reaction with amazed expressions.
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  • Aerial view of a geodesic dome building beside water with modern structures. — O Background
    Aerial view of a geodesic dome building beside water with modern structures.
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  • Floating science and biology symbols against a starry background with a large red question mark. — O Background
    Floating science and biology symbols against a starry background with a large red question mark.
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  • Black atomic symbol icon with three orbiting electrons on white background. — O Background
    Black atomic symbol icon with three orbiting electrons on white background.
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  • Satellite orbiting Earth at night with glowing city lights and starburst illumination. — O Background
    Satellite orbiting Earth at night with glowing city lights and starburst illumination.
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  • Nine science logo icons with teal and black line art. — O Background
    Nine science logo icons with teal and black line art.
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  • Hands holding a potted plant that transforms into a glowing lightbulb with floating particles. — O Background
    Hands holding a potted plant that transforms into a glowing lightbulb with floating particles.
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  • Human hand holding robotic hand in futuristic lab with digital displays. — O Background
    Human hand holding robotic hand in futuristic lab with digital displays.
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  • Close-up of a scientific microscope in a lab setting. — O Background
    Close-up of a scientific microscope in a lab setting.
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  • Circular blue graphic with icons representing science and education themes. — O Background
    Circular blue graphic with icons representing science and education themes.
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  • Children in tie-dye shirts look up at a giant Earth globe in a science museum. — O Background
    Children in tie-dye shirts look up at a giant Earth globe in a science museum.
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  • Science doodle illustration with lab equipment and formulas — O Background
    Science doodle illustration with lab equipment and formulas
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  • Two researchers in protective gear working in a laboratory with safety cabinets. — O Background
    Two researchers in protective gear working in a laboratory with safety cabinets.
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  • Scientific glassware filled with glowing liquid under colorful lighting. — O Background
    Scientific glassware filled with glowing liquid under colorful lighting.
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  • Students wearing safety goggles work together in a science lab with test tubes. — O Background
    Students wearing safety goggles work together in a science lab with test tubes.
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  • DNA helix wrapped around science books in a colorful space scene with planets and stars. — O Background
    DNA helix wrapped around science books in a colorful space scene with planets and stars.
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  • Glowing virus particles with molecular structures floating in a gradient background. — O Background
    Glowing virus particles with molecular structures floating in a gradient background.
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  • Two students conducting a chemistry experiment with test tubes and goggles. — O Background
    Two students conducting a chemistry experiment with test tubes and goggles.
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  • Glowing green DNA strand surrounded by chemical formulas in a dark digital space. — O Background
    Glowing green DNA strand surrounded by chemical formulas in a dark digital space.
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  • Hands holding a phone with a glowing digital network of user icons. — O Background
    Hands holding a phone with a glowing digital network of user icons.
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  • Business team collaborating with digital network icons and globe overlay. — O Background
    Business team collaborating with digital network icons and globe overlay.
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  • A scientist working at a desk inside the light cone of a large microscope. — O Background
    A scientist working at a desk inside the light cone of a large microscope.
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  • Starship flying near a planet and moon in space — O Background
    Starship flying near a planet and moon in space
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  • Popular Science magazine logo in bold black letters on light gray background. — O Background
    Popular Science magazine logo in bold black letters on light gray background.
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  • Person studying with scientific symbols and equations floating from their head. — O Background
    Person studying with scientific symbols and equations floating from their head.
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  • Surreal space scene with skull dinosaur spaceship and planet glowing dna strands. — O Background
    Surreal space scene with skull dinosaur spaceship and planet glowing dna strands.
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  • Science-themed graphic with icons like microscope and DNA strand. — O Background
    Science-themed graphic with icons like microscope and DNA strand.
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  • A colorful flat illustration of science tools and symbols for educational purposes. — O Background
    A colorful flat illustration of science tools and symbols for educational purposes.
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  • Scientist examining samples with lab equipment and scientific symbols. — O Background
    Scientist examining samples with lab equipment and scientific symbols.
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  • Diagram illustrating Newton's gravity law with apple tree on Earth and moon above. — O Background
    Diagram illustrating Newton's gravity law with apple tree on Earth and moon above.
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  • Dark silhouette of a person with afro hair against teal background with glowing yellow spots. — O Background
    Dark silhouette of a person with afro hair against teal background with glowing yellow spots.
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  • Science education center banner with lab tools and atomic symbols. — O Background
    Science education center banner with lab tools and atomic symbols.
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  • Hands holding a glass orb containing glowing molecular structures with lightning in the background. — O Background
    Hands holding a glass orb containing glowing molecular structures with lightning in the background.
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  • Community transitioning from pollution to renewable energy with wind turbines and solar panels. — O Background
    Community transitioning from pollution to renewable energy with wind turbines and solar panels.
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  • Two scientists holding test tubes with molecular graphics in the background. — O Background
    Two scientists holding test tubes with molecular graphics in the background.
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  • Glowing golden circuit board shaped like a brain with lit nodes on dark background. — O Background
    Glowing golden circuit board shaped like a brain with lit nodes on dark background.
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  • Two people assembling a mechanical heart with gears and clocks. — O Background
    Two people assembling a mechanical heart with gears and clocks.
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  • Five diverse doctors walk through a rainbow archway, including one in a wheelchair. — O Background
    Five diverse doctors walk through a rainbow archway, including one in a wheelchair.
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  • A metallic disc suspended in a vibrant blue water splash with mist and droplets. — O Background
    A metallic disc suspended in a vibrant blue water splash with mist and droplets.
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Showing 541–600 of 1,376 wallpapers

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Frequently asked questions

Is the full-size version of these O Backgrounds free too?

Completely free. Skip the sign-up; it is not needed. The large sizes are not held back behind a paywall.

What pairs well with O Backgrounds?

Try yellow, pink, superman, black next. Each keeps its own roster.

Which screen shapes do these O Backgrounds suit?

Both shapes are here. 48 run wide; 12 run tall. Filter by eye — the tall ones suit phones, the wide ones desktops.

How big is this collection of O Backgrounds?

We are holding 1,376 O Backgrounds at present. More are added on a rolling basis. All free, no account, no watermark.