Online Image Resizer - Resize Images for Free

Resizing settings

Drag & drop images here or click to select

Supported formats: JPG, PNG, WEBP, GIF, BMP

What is image resizing?

Image resizing is the process of changing an image’s dimensions to a smaller size. This is useful for website optimization, sharing on social media, or saving disk space.

Why resize images?

Faster website loading

Smaller images load faster, which improves user experience and SEO.

Space saving

Resized images take up less space on disk or in cloud storage.

Suitable for social media

Different platforms require different maximum image dimensions.

Performance optimization

Smaller files mean less data consumption and faster application loading.

How to use this tool?

  1. Set parameters - Select mode (percentage or fixed dimensions) and quality
  2. Upload images - Click the “Browse files” button or drag and drop images
  3. Automatic processing - Images will be automatically resized according to your settings
  4. Download - Download individual images or all at once as a ZIP archive

Resizing modes

Percentage

Reduce the image to a certain percentage of its original size:

  • 50% - half the size (quarter of the data size)
  • 75% - three-quarters of the original size
  • 25% - quarter size (1/16 of the data size)

Dimensions in pixels

Set a specific width or height in pixels:

  • Maintain aspect ratio - Enter only width or height
  • Fixed dimensions - Enter both values for an exact size
  • Common sizes - 1920×1080 (Full HD), 1280×720 (HD), 800×600

Quality settings

Quality determines the ratio between file size and image quality:

  • 100% - maximum quality, largest files
  • 90-95% - excellent quality, optimal for most uses
  • 80-90% - good quality, smaller files
  • Below 80% - visible loss of quality

Supported formats

  • JPG/JPEG - photographic format
  • PNG - format with transparency
  • WEBP - modern format
  • GIF - animated and static images
  • BMP - basic bitmap format

When to resize images?

For web

  • Background images (max. 1920px width)
  • Product thumbnails (400-800px)
  • Blog images (800-1200px)
  • Icons and logos (as needed)

For social media

  • Facebook posts: 1200×630px
  • Instagram posts: 1080×1080px
  • Twitter headers: 1500×500px
  • LinkedIn banners: 1584×396px

For email

  • Maximum width: 600px
  • Total size: under 100KB per image

Optimization tips

Maintaining quality

  • For photos, use 85-95% quality
  • For graphics with text, use PNG or 100% quality
  • Always keep original files

Dimension selection

  • Never enlarge images (quality degradation)
  • Use even pixel numbers for better compatibility
  • Consider different versions for various devices (responsive)

Batch processing

  • Process multiple images at once to save time
  • Use the same settings for consistent results
  • Download all as ZIP for easy management

Practical savings calculator

Example: Blog with 50 articles

Before optimization:

  • 50 articles × 1 main image (2000×1200, 1.8 MB)
  • Total: 90 MB
  • Loading time (4G): 18 seconds

After resizing (1200×720, quality 85%):

  • 50 articles × 1 main image (380 KB)
  • Total: 19 MB (79% savings)
  • Loading time (4G): 4 seconds

Result:

  • ⚡ 4.5× faster loading
  • 💾 71 MB of saved space
  • 🔋 Lower data consumption for mobile users
  • 📊 Better SEO due to speed

Frequently Asked Questions (FAQ)

How many times can I resize an image without losing quality? Once. Each subsequent reduction degrades quality. Always work with the original and create the necessary sizes all at once.
Will I lose EXIF data when resizing? It depends on the tool. This tool preserves EXIF. If you want to remove EXIF (privacy), use a specialized tool.
What is the ideal format for web images? For photos: JPG (80-85% quality) or WEBP. For graphics with transparency: PNG or WEBP.
Should I resize images before or after format conversion? First resize dimensions, then convert. A smaller file = faster conversion.
How to resize an image without losing sharpness? Use a quality resampling algorithm (Lanczos, Bicubic). Never use "Nearest Neighbor" for photos.
Can I resize vector images (SVG)? SVGs are vector-based; they don't need resizing. You can scale them to any size without quality loss.
How do I find out what image size I need? Measure the space on your website using developer tools. Add 2× for Retina displays. Example: 600px space = 1200px image.
What if I need different sizes of the same image? Create all sizes at once from the original. Do not create them by successive resizing (quality degradation).

Advantages of this tool

  • 100% free - no registration or limitations
  • Privacy protection - everything happens locally in your browser
  • Batch processing - resize multiple images at once
  • Flexible settings - percentages or fixed dimensions
  • Quality control - adjustable compression
  • Aspect ratio preservation - automatic calculations
  • No size limit - no file size restrictions
  • Fast - instant processing without uploading to a server
  • Modern formats - supports WEBP, PNG, JPG, and more
  • EXIF preservation - Metadata remains untouched