What layouts are supported for merging images?

You can merge images into Vertical Stacks, Horizontal Strips, Grid Collages (2x2, 3x3, custom columns), or Side-by-Side comparisons.

Can I reorder the images before merging?

Yes. You can drag-and-drop image thumbnails or use arrow buttons to arrange the exact sequence before generating the composite.

Can I add spacing, borders, or custom background colors?

Yes. You can customize padding between images, border thickness, border radius, and choose transparent, white, black, or custom hex background colors.

What is the maximum output resolution?

The merger can generate high-resolution canvases up to 8K depending on your device's GPU capabilities, making it ideal for printable posters and banners.

All stitching and composite rendering occurs 100% inside your local web browser. No photos are ever uploaded to a server.

What is the maximum number of images and file size limit for merging?

You can merge up to 20 images in a single composite, with each individual image supporting up to 500 MB.

How does the tool prevent browser crashes when merging multiple large photos?

The merger uses tiled canvas downsampling and adaptive memory allocation, ensuring smooth rendering on desktop and mobile devices without running out of GPU texture memory.

Can I stitch images that have different aspect ratios or orientations?

Yes. The tool features smart auto-fit options to match widths for vertical stacks, match heights for horizontal strips, or crop to uniform tiles in grid mode.

image-file-tools100% Client-Side LocalPopular

Bulk Image Merger – Merge Multiple Images Online

Combine and stitch multiple photos into one high-quality image directly in your browser — no uploads, no watermark. Choose from multiple layouts (Grid, Horizontal strip, Vertical stack), reorder images with drag & drop, customize spacing, margins & rounded corners, add styled borders and shadow effects, select custom background colors or transparency, choose canvas sizing presets (Auto, A4, Letter, Social Media), export to JPEG, PNG, or WebP with adjustable quality, and preview everything in real-time — 100% client-side and free.

Privacy Guarantee: Your images are merged locally on your computer using browser Canvas technology. Files never leave your device.

100% Local Processing Zero Server Uploads

Up to 20 images · Instant Web Worker compilation

Upload Images

Drag, browse, or paste images with Ctrl+V.

0 / 20 images

Drag & drop images or tap to browse

Browse files or paste from your clipboard

JPG, PNG, WebP, GIF, AVIF, BMP, TIFF, SVG, HEIC

Upload Notice: By uploading, you confirm you have necessary rights to process these files.

Live Preview

Upload images to see the merged layout preview.

Merge Layouts

Layout

Image Options

Spacing12px

Border Thickness

Rounded Corners0px

Background

Alignment

Frame Options

Frame Style

Image Sizing

Canvas & Output

Canvas

Output

Processing Summary

Images

Original Size

0 B

Memory Estimate

0 B

Output Size

Pending

About Bulk Image Merger

Bulk Image Merger is a powerful, privacy-first web utility that stitches and combines multiple images into a unified graphic directly in your browser. Your images never leave your device.

Multiple Merge Layouts: Side-by-side horizontal strips, vertical columns, or 2×2 / 3×3 / auto photo grids
Drag & Drop Reordering: Easily rearrange, swap, or re-index your images before merging
Spacing & Padding: Pixel-perfect control over image spacing, outer canvas margins, and rounded corner radius
Frame & Border Styles: Solid, dashed, dotted, or double borders with custom thickness and color picker
Background Control: Choose white, black, custom hex color, or transparent background for PNG/WebP
Canvas & Print Presets: Auto dimensions or presets for A4, US Letter, Instagram Square, and Stories
Image Sizing Modes: Fit to preserve full photos, Fill to crop evenly, or Stretch to match cell dimensions
Multiple Output Formats: Export high-resolution results in JPEG, PNG, or WebP formats
Quality Compression: Fine-tune image quality from 10% to 100% to balance file size and visual sharpness
Interactive Live Preview: Instant canvas rendering with zoom, pan, and clipboard copy functionality

Why Choose SPAUL Hub?

100% Client-Side: Your privacy is paramount. Images are merged inside your browser memory without being transmitted to any remote server.
Rich Styling Options: Customize margins, layout orientations, grid spacing, background colors, border styles, and output quality instantly.
No Limits & Free: Merge up to 10 high-resolution images at once for free, with no signup, watermarks, or processing queues.

How to Use This Tool?

Add Images

Drop up to 20 images onto the canvas, browse local files, or paste with Ctrl+V.

Choose Layout

Select vertical, horizontal, grid, or auto orientation. Drag and reorder items as desired.

Adjust Appearance

Modify spacing, custom borders, corner rounding, alignment modes, and background options.

Export Result

Click 'Merge Images' to compile, then download the resulting layout in PNG, JPEG, or WebP format.

Explore Other Image & File Tools

Photo & Signature Resizer

Resize, compress, and convert images to exact file sizes. 100% local processing.

Bulk Image Resizer

Resize unlimited images with multiple modes, presets, and ZIP download.

Photo Metadata Viewer

Strip private GPS location and metadata from your photos before sharing.

ZIP File Size Reducer

Shrink large ZIP files directly in your browser with smart recompression.

Bulk Image Merger FAQ

⚠️ Disclaimer

Bulk Image Merger processes and renders images locally in your browser using HTML5 Canvas and Web Workers. Rendering speed and maximum canvas dimensions depend on your device memory and browser hardware acceleration capabilities. Transparent backgrounds are preserved in PNG and WebP formats; JPEG format will automatically replace transparency with the selected background color.

🛡️ Privacy Focused

All image stitching, rendering, and encoding happens 100% locally on your device. No images are uploaded to any server or cloud service. Your images and personal files remain private and secure at all times.

Companion Guides & Technical Insights

All Guides

Media & FilesMay 2, 2026

Reducing Photo and Signature Size for Government Exams: A Simple Guide

Struggling with 20KB-50KB limits for online applications? Learn how to resize and compress photos and signatures instantly.

Read Article

Related Tools

Similar utilities & calculators

Free Photo & Signature Size Reducer – 20KB, 50KB & More

Resize and compress images to 20KB, 50KB and other target sizes for government exams, ID documents and social media. Free, secure browser-based image resizer.

image file-tools

Popular

Bulk Image Resizer – Resize Multiple Images Online

Resize multiple JPG, PNG and WebP images online for free. Set custom dimensions, maintain aspect ratio and process images securely in your browser with no uploads.

image file-tools

Photo Metadata Viewer & EXIF Inspector

View hidden EXIF data, GPS location, camera details and timestamps with this free Photo Metadata Viewer. Analyze AI-generated image indicators privately with no uploads.

image file-tools