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Why merge images?
Merging lets you build collages, single files from multiple photos, before/after strips, and layouts for social posts and websites—without desktop software.
Benefits of image merging
- Collages: Combine photos into one layout.
- Comparisons: Place images side by side for before/after or A/B views.
- Social content: Create wider or taller visuals for feeds and stories.
- Fewer files: Share or archive one image instead of many.
- Flexible layout: Horizontal, vertical, or grid to match your idea.
How image merging works
The tool builds one canvas, places each image in order, applies spacing and background, then exports—using the Canvas API in your browser for speed and privacy.
Merging process
- Analysis: Reads dimensions and properties of each image.
- Canvas size: Computes width and height from direction, spacing, and grid.
- Placement: Positions each image in order with your spacing.
- Resize if needed: Aligns dimensions along the merge axis with quality-aware scaling.
- Render: Draws everything onto one canvas.
- Export: Encodes to PNG, JPG, WEBP, or other chosen format.
Merging methods
Pick a method that matches your design goal.
Horizontal merging
Places images left to right—great for panoramas, before/after rows, and wide banners.
Vertical merging
Stacks images top to bottom—ideal for tall collages, step lists, and mobile-first layouts.
Grid merging
Arranges images in rows and columns—useful for photo grids, mood boards, and multi-image tiles.
Image merging facts
A few points that help you plan better merges.
Why merged layouts matter
- Collage-style posts often get more engagement than single images on visual platforms.
- Side-by-side comparisons can clarify product or design differences quickly.
- Grids help organize many thumbnails in one shareable asset.
- One merged file can be easier to email or upload than many attachments.
- Consistent spacing and alignment make compositions look intentional and professional.
Best practices
Follow these tips for cleaner results.
Image selection
- Prefer similar lighting and color tone across images.
- Similar aspect ratios reduce heavy scaling.
- Pick images that read well together at a glance.
- Think about final width/height for where you will publish.
- Start from high-quality sources when possible.
Layout considerations
- Use consistent spacing between cells or strips.
- Align edges and baselines for a polished look.
- Preview on mobile if that is your main audience.
- Keep important subjects away from crop edges.
- Check the merged image at the size you will publish.
Common use cases
Teams and creators use merging across channels.
Social media marketing
Build collages and comparison posts for feeds and ads.
E-commerce
Show multiple angles or variants in one listing-friendly image.
Photography
Combine shots for portfolios, albums, or client previews.
Web design
Create hero strips, galleries, and asset bundles for mockups.
Runs in your browser—your images are not uploaded to our servers for processing.
Frequently asked questions
How many images can I merge at once?
You can merge several images in one session. Practical limits depend on your device memory—often on the order of 10–20 images. For huge batches, merge in smaller groups.
What is the difference between horizontal and vertical merging?
Horizontal places images side by side (wider canvas). Vertical stacks them (taller canvas). Choose based on whether you want a row or a column story.
Can I change the order after uploading?
Yes. Drag images to reorder before merging. Order controls left-to-right or top-to-bottom sequence.
What if images have different sizes?
Images are scaled to align along the merge direction—typically matching the tallest (horizontal) or widest (vertical) so the row or column looks even.
Can I add space between merged images?
Yes. Use the spacing control to add gaps between images for clearer separation.
What output format should I use?
PNG is ideal when you need transparency or lossless graphics. JPG is fine for photo-heavy merges without transparency. WEBP balances size and quality for the web.
Will merging reduce image quality?
Merging does not inherently lower quality, but scaling to match sizes can soften detail. We use high-quality resampling; starting with similar resolutions helps.