Chromis
One-tap background removal
On-device AI finds your subject and cuts it out cleanly - Google ML Kit with a bundled U²-Netp model as a universal fallback.
Free · On-device AI · Android
Erase the background.
Not your privacy.
Cut out subjects, remove what you didn't want in the shot, then stack layers with filters, shadows and blend modes - powered by AI that runs entirely on your phone.
Free, ad-supported · one-time upgrade removes ads · no account, ever.
Before
After · AI cut-out
New · Object removal
Take it out. Put the background back.
Tap the thing you wish wasn't in the shot - a bin, a sign, a stranger at the edge of the frame - and it goes. The question most editors never answer is what goes there, and a transparent hole is not an answer. Chromis rebuilds the background behind it, on your phone.
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Fill in, or Erase - you pick first
The chooser sits at the top of the panel and Fill in is the default, because "remove this" means a closed background to nearly everybody. Erase is still one tap away when you actually want transparency.
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A generative model, bundled
Fill runs a 27 MB image-completion network that ships inside the app, so it works in flight mode. Where that can't help it falls back to a content-aware fill that always runs - the feature degrades instead of disappearing.
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It knows what you pointed at
A tap is turned into a selection by MobileSAM, so you get the whole object rather than a blob the size of your fingertip. Tapping your main subject is safely ignored, and undo brings anything back.
14 looks, one tap
Try the filters right here
These aren't mock-ups. Every look below is the app's own colour transform, lifted straight out of the source and handed to your browser - so what you pick here is exactly what your photo gets.
Every look keeps its own strength slider, and none of them touch your original pixels - switch or undo at any time.
Beyond colour
Depth, glow and grit
Vignette, HDR, drop shadow and contour are painted rather than tinted, and they stack on top of any filter. Shadow and contour go on any layer; vignette and HDR reach into pixels, so those two belong to a photo.
BeforeVignette
Vignette
Nine colours, with size and softness. On a cut-out it follows the subject's silhouette instead of shading a rectangle behind it.
BeforeHDR 100%
HDR
Lifts shadows, holds the highlights, then adds local contrast - the look a phone camera's HDR mode gives you, on a slider.
Drop shadow
Direction, distance, blur, spread, colour and opacity. It travels with the layer, so a rotated sticker keeps its shadow.
Contour
A stroke grown out of the layer's own silhouette - the die-cut sticker edge. On text, the same control gives you an outline.
One tap, real AI
Cut it out. Drop it anywhere.
The before/after at the top is a genuine result from the app's on-device model - no cloud, no touch-ups. Once your subject is free, put it on any backdrop or export it as a transparent PNG.
Sunset
Pop
Transparent PNG
Photo grid
Collages that hold their shape
A grid is a partition of the canvas, not a separate kind of document - so a cell is just a window onto the same editor. Cut out a subject, stack a filter, drop in text: every tool works inside a cell exactly as it does anywhere else.
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18 layouts, 2 to 5 photos
Four ways to place two photos, four for three, five each for four and five - named the way you'd describe them: Side by side, Big left, 2 over 3. Swap layout at the same count and photo N stays in cell N.
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A divider moves two cells
Drag one and it trades space between exactly those two neighbours - every other cell keeps its rect. No cell shrinks past 12% of its split, and the whole drag is a single undo.
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The border is the background
Gaps and the outer frame are the fill showing through, not a stroke laid over your photos. One Border slider from 0 to 80 px sets both, Corners runs 0 to 60 px, and there are nine preset colours.
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Nothing is locked in
Count, layout, border, corners and colour stay in the Grid panel for the life of the project. Dropping to fewer photos does remove the ones in the cells that go - and one undo brings them back.
New · Snap & place
Line things up without squinting
Drag a layer and it settles onto the nearest alignment - the edges and centres of every other layer, and of the canvas itself - with a guide line showing exactly what it caught. Pinch instead and it will match a neighbour's size as well; a plain drag never resizes anything. Turn the toggle off and nothing moves but your finger.
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Tilted layers line up too
Alignment is measured along the layer's own axes, not the screen's, so two stickers at the same angle can be made genuinely flush. Carry one up against a neighbour a couple of degrees off and it takes that angle.
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Sliders for the layer you can't grab
Scale, Rotation, Horizontal and Vertical now drive any layer - a caption, a speech bubble, a photo. A sticker pinched down to a speck used to be smaller than a fingertip and stuck that way; now it is a slider.
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Nothing is a trap
Rotation snaps to straight over the last couple of degrees, both placement sliders snap to dead centre, and every one of them is a single undo step.
Everything in one editor
A full studio in your pocket
From a one-tap cut-out to layered compositions with filters, blend modes and collages - every tool runs locally on your device.
Object removal that fills in
Point at anything you don't want - a photobomber, a sign, a stray leash - and a bundled generative model rebuilds the background behind it.
14 filters, HDR & vignette
One-tap looks with a strength slider, an HDR pass that lifts shadows and local contrast, and a vignette in any of nine colours.
Shadow, contour & blend
Give any layer a directional drop shadow and a die-cut contour, then composite it with 16 blend modes - Multiply through Luminosity.
Layers, merge & flatten
Stack, move, scale and rotate freely. Merge two layers or flatten the lot into one photo - each a single undo step.
Photo grid collages
Two to five photos across 18 layouts. Drag the dividers, restyle the border, and keep using every other tool inside a cell.
Text & comic bubbles
Captions in bold display fonts with their own outline and shadow, plus rotatable, re-tailed speech bubbles.
Adjust, erase & crop
Fine-tune light and colour, brush away stray pixels by hand, and crop the canvas freeform or to any ratio.
Snapping & placement
Layers settle onto each other's edges and centres with a guide showing the catch, and a pinch matches size too - and Scale, Rotation and the two placement sliders drive a caption or a bubble, not just a photo.
Light and dark
Pure black on OLED so the pixels are genuinely off, pure white that stays readable in daylight. Follows your phone, or pin either one.
Six languages
English, Polish, German, Spanish, French and Czech - the whole app, not just the menus. Follows your phone or set it in Settings.
Export with transparency
Save or share as a transparent PNG, JPG or WebP at full size or a fraction of it - straight to your gallery or any app.
Why Chromis
Powerful edits, nothing to hide
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Private by design
Background removal, object erase, adjustments - it all happens on your device. Your photos never leave your phone unless you choose to share them.
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Free to use
Every editing tool is free, supported by ads. Prefer a clean canvas? One small one-time purchase removes ads for good.
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No account, works offline
No sign-up and no login. Because the AI runs locally, editing keeps working even without a connection.
Take a look
Inside the editor
Filters, collages, layers and one-tap AI - all running on your phone.
Remove object
Fill in, or erase
Effects
Filters, HDR & vignette
Photo grid
Collages with draggable dividers
AI Cut
One tap, then snap it into place
Layers
Stack, merge & flatten
Text & bubbles
Captions and comic shapes
Turn your phone. Or bring a tablet.
In landscape the dock becomes a rail down the left edge and the tool panel folds away, so the photo gets the room it deserves. Tablets get the same layout with a wider canvas - this is a 10-inch one.
Good to know
Frequently asked
Do my photos get uploaded anywhere?
No. Background removal, object erase and every other edit run on your device. A photo only leaves your phone if you explicitly share or export it. See the Privacy Policy for details.
Is it really free?
Yes - all editing tools are free and supported by ads. If you'd rather not see ads, a single one-time in-app purchase removes them permanently.
Does the AI need an internet connection?
Almost never. The models that do the work ship inside the app - the U²-Netp cut-out, the tap-to-select network and the generative fill - so removing a background or an object works in flight mode. The one exception is the other cut-out engine, Android's own ML Kit, which fetches its model through Play services the first time it runs; the bundled one is there for exactly that case, and the app falls back to it. Otherwise a connection is for ads, purchases and the consent form.
What's the difference between Fill in and Erase?
Fill in rebuilds the background where the object was, using the rest of the photo, so removing someone from a beach leaves beach. Erase cuts the object to transparency instead, which is what you want when you're about to drop the result onto a different backdrop. The chooser is at the top of the Remove object panel and Fill in is the default; either way, undo brings the object back.
What languages does the app speak?
English, Polish, German, Spanish, French and Czech - the whole interface, not just the menus. It follows your phone's language by default, and Settings has a picker if you'd rather pin one. Each language is listed in its own script, so you can always find your way back.
Does it have a light theme?
Yes, and a dark one, and it follows your phone unless you pin either in Settings. Dark is pure black rather than a dark grey, which on an OLED screen means those pixels are genuinely switched off; light is pure white so it stays readable in daylight.
Are the filters on this page the real ones?
Yes. The 14 looks in the gallery above are the app's own colour matrices, exported from the source and applied by your browser - not screenshots or approximations. A build step regenerates them from the code, and a test renders every look both ways and compares the pixels, so the page can't drift from the app.
Can I change a collage's layout after the photos are in?
Yes. Photo count, layout, border width, corner radius and border colour all stay in the Grid panel for the life of the project. Swapping to another layout at the same photo count keeps each photo in its cell and re-fits it to the new shape. Dropping to a lower count removes the photos in the cells that go, as one undoable step.
Does it work on a tablet, or in landscape?
Both. Turn the phone and the tool dock becomes a rail down the left edge with a folding panel beside it, so the photo gets the width. Tablets get the same layout with a larger canvas.
Which Android versions are supported?
Android 8.0 (Oreo) and newer. Tap-to-select object removal asks for 2.5 GB of RAM or more - under that the app declines to offer it rather than risk being killed mid-edit, and the simpler selection still works. Background removal runs everywhere.
Is there an iPhone version?
Chromis is Android-first. An iOS version may follow - let us know if you'd like it.
Get in touch
Say hello
Questions, bugs or feature ideas? Send a message - we read every one.
Ready to make something?
Object removal, cut-outs, filters, layers and collages - free, on-device and private.
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