How to Bulk Resize Images with BIRME

BIRME is a browser-based bulk image resizer: drop in multiple JPG, PNG, WebP, or AVIF files, set width/height (or lock the ratio), choose crop behavior, output format, quality, renaming, and optional watermark/border, then download files individually, save them to a folder, or export a ZIP. It requires no signup or install, and per the site, processing runs in your browser rather than uploading private files. It works best on a desktop computer; on a phone, the site points to its separate apps.

Before you start

• Use a desktop browser for the most reliable experience (the site explicitly recommends desktop).
• Have your source images ready in JPG, PNG, WebP, or AVIF.
• Decide your target dimensions and whether you want to crop or just scale.
• If you plan to publish online, decide the output format and quality level in advance.

Step-by-step: bulk resize and export

1. Add your images

Drop your images into the workspace, or use Browse from your computer. You can add more files after the first batch. The interface shows a file list you can manage.

2. Set dimensions and ratio

Enter Width and/or Height in pixels. Each field has an Auto option, and there is a Ratio lock. Typical choices:

• Set width only and leave height on Auto to scale proportionally.
• Set both width and height when you need exact dimensions; then decide how the image should fit (see crop below).
• Use the ratio lock to keep the original aspect ratio while changing one dimension.

3. Choose crop behavior

BIRME offers smart cropping with auto focal point detection to keep important parts in frame, or you can set the focal point manually. You can also draw a custom crop region on each image individually. If you don't want any resizing, there is a Do not resize option.

4. Pick quality and output options

• High Quality Resize Method is available (the site notes it may crash in some browsers, so test on a small batch first).
• Choose Image Format & Quality: same as original, JPEG, WebP, or AVIF, with quality sliders for JPEG, WebP, and AVIF.
• Optionally add a Watermark (text or image, with adjustable position, size, and opacity) and a Border (color and thickness).

5. Rename files (optional)

Use the Rename Pattern field, for example image-xxx or ORIGINAL-NAME_400x400, and set a Starting number for sequential numbering. This is useful when exporting many files with consistent names.

6. Export

Choose one of:

• Download Files for individual downloads.
• Save into a folder to write directly to a folder.
• Download zip to get everything in one archive.

Use Remove All or Reset Settings to start over. Settings are saved automatically and restored on your next visit.

Quick reference

Common snags

• High Quality Resize Method crashes a browser. The site warns this can happen; try a smaller batch or disable it if the tab becomes unstable.
• Unexpected cropping. Check whether a focal point was auto-detected or manually set; switch to a custom crop if a specific region matters.
• Wrong output format or size. Confirm the format and quality settings before exporting, since these apply to the whole batch.
• Phone use. The main tool is desktop-oriented; the site directs mobile users to its separate apps.

What else BIRME can do

Beyond resizing, the same workspace supports batch renaming, watermarking, borders, background removal with AI (exporting transparent PNG or WebP), and AI super-resolution to enlarge small images by 2x, 3x, or 4x. These are optional extras if your task goes beyond simple resizing.