Local-first · no accounts · no uploads
Combine
anything.
Photo grids, carousels, comparisons, and moodboards — cut, arranged, and exported entirely in your browser. Your photos never touch a server.
Press ⌘K anytime to jump straight to a tool
The workbench — four tools
Smart Grid Mosaic
Drop in 2–30 photos for a balanced, zero-crop layout. Drag to reorder, sort by color, pick a frame style, and undo any step.
Open tool →Social Carousel Builder
Slice one panorama into 3–10 seamless swipeable frames with per-slide captions and a safe-zone guide for text overlays.
Open tool →Before & After
Overlay two photos with a draggable comparison slider. Add labels plus arrow and callout annotations to point at specifics.
Open tool →Freeform Moodboard
An open canvas for photos, notes, and swatches. Pull a color palette straight out of any photo, align, duplicate, and undo freely.
Open tool →Smart, on-device tools
Command palette
Press ⌘K to jump to any tool or flip the workspace theme without touching the mouse.
Undo, everywhere
Grid and Moodboard track every move — ⌘Z steps back, ⌘⇧Z steps forward, no confirmation dialogs.
Sort by color
Grid Mosaic can reorder your photos by dominant hue for a layout that reads as one continuous gradient.
Palette extraction
Drop a photo on the Moodboard and pull its five dominant colors out as swatches, sampled on-device.
Drag to reorder
Reorder Grid Mosaic thumbnails by hand, or let Shuffle and Sort do it for you.
Light & dark workspace
A cutting-mat dark theme and a drafting-desk light theme — matches your system, or toggle it yourself.
How it works
- 1
Drop your photos
Into any tool on this page. Files are read directly by your browser — nothing is uploaded anywhere.
- 2
Arrange & adjust
Auto-layouts do the heavy lifting; sliders and drag handles let you fine-tune every gap and corner.
- 3
Export instantly
Download a high-resolution PNG or JPG straight from memory. No queue, no compression, no watermark.
Questions
Do my photos ever get uploaded anywhere?
No. Every tool reads files directly in your browser using the File and Canvas APIs, and exports are generated and downloaded the same way. Nothing is sent to a server — collage.tools doesn't even have one to send it to.
Do I need an account?
No sign-up, no login, no email. Open a tool and start dropping in photos.
What image formats can I use?
Any format your browser can decode — JPG, PNG, WebP, GIF, and most HEIC-converted photos. Exports come out as PNG or JPG.
Will my work survive a page refresh?
Not currently — everything lives in memory for the session. Export before you close the tab. Undo history is also cleared on refresh.
Does it work offline?
Once a tool has loaded, yes — there's no server round-trip for arranging or exporting. You'll still need a connection for the very first page load.
Is it really free?
Yes — no paywalls, no watermarks, no premium templates. There's nothing to unlock.