Image Resizer Online

Resize, compress, convert and edit images in seconds. Supports JPG, PNG, WebP, AVIF, GIF and more — with 30+ social-media presets, batch processing, filters, watermarks, and lossless quality output.

Click or drag & drop images here

JPG, PNG, WebP, GIF, BMP, TIFF, AVIF — up to 50 MB each · up to 50 files

Everything You Need to Edit Images

A complete online image editor powered by Python (Pillow) — professional-grade results without installing any software.

Resize by Pixels

Set exact width & height in pixels with aspect ratio lock. Fit or fill modes for perfect cropping.

Resize by Percentage

Scale up or down by percentage — 25%, 50%, 75%, 150%, 200% and any custom value.

30+ Social Presets

Instagram, Facebook, Twitter/X, LinkedIn, YouTube, TikTok, Pinterest, OG image, favicons and more.

Format Conversion

Convert between JPG, PNG, WebP, AVIF, GIF, BMP and TIFF with quality control and EXIF stripping.

10 Photo Filters

Grayscale, Sepia, Vintage, Fade, Warm, Cool, Dramatic, Noir, Invert — one click effects.

Advanced Adjustments

Fine-tune brightness, contrast, saturation, sharpness and Gaussian blur with precision sliders.

Rotate & Flip

Rotate 0°, 90°, 180°, 270° and flip horizontally or vertically for perfect orientation.

Text Watermark

Add customizable text watermarks with position, opacity, font size, color and tiling options.

Batch Processing

Upload up to 50 images, apply the same settings to all, and download as a single ZIP file.

Privacy Guaranteed

Images are processed server-side and immediately discarded. We never store your files.

Lightning Fast

Python + Pillow backend processes images in milliseconds using optimized LANCZOS resampling.

Works Everywhere

No software to install. Works on Windows, Mac, Linux, iOS and Android — any browser.

Social Media Image Sizes 2026

One-click resize to the perfect dimensions for every platform

Instagram

  • Square Post1080×1080
  • Portrait Post1080×1350
  • Story / Reel1080×1920

Facebook

  • Cover Photo820×312
  • Post Image1200×630
  • Story1080×1920

Twitter / X

  • Header Banner1500×500
  • Post Image1200×675
  • Profile Photo400×400

YouTube

  • Thumbnail1280×720
  • Channel Banner2560×1440
  • Profile800×800

LinkedIn

  • Cover Photo1584×396
  • Post Image1200×627
  • Profile400×400

TikTok

  • Video Cover1080×1920
  • Profile Photo200×200

Pinterest

  • Standard Pin1000×1500
  • Square Pin1000×1000

Web / OG

  • Open Graph1200×630
  • Favicon 32px32×32
  • Apple Touch180×180

How to Resize an Image Online

Resize, compress and convert your images in 3 easy steps — no software required

01

Upload Your Image

Click "Select Images" or drag & drop your photo. Supports JPG, PNG, WebP, GIF, BMP, TIFF, AVIF. Multiple files supported for batch processing.

02

Choose Your Settings

Set dimensions in pixels or percentage, choose a social media preset, select output format, apply filters, add watermark, and more.

03

Download Result

Click "Download Image" to get your processed file instantly. Or batch-download all images as a single ZIP archive.

Supported Image Formats

JPG / JPEG
PNG
WebP
AVIF
GIF
BMP
TIFF

Frequently Asked Questions

Is this image resizer completely free?
Yes — GeoToolsHub Image Resizer is 100% free with no registration, no watermarks added by us, and no hidden fees. You can resize, compress, convert and batch-process as many images as you need.
How do I resize an image without losing quality?
Use the LANCZOS resampling algorithm (selected automatically), keep the output quality slider at 85-95%, and choose PNG or WebP for lossless or near-lossless output. Avoid upscaling images as that always introduces some quality loss.
Can I resize multiple images at once?
Yes. Upload up to 50 images using the batch upload button, configure your settings once, and click "Download All as ZIP" to process and download all images with the same settings in a single archive.
What is the maximum image size supported?
The backend accepts files up to 50 MB each. For very large images (>20 MP), processing may take a few extra seconds. There is no limit on output dimensions — you can create images up to 10,000 × 10,000 pixels.
Are my images stored on your server?
No. Images are processed in memory during the request and immediately discarded when the response is sent. We do not store, analyze, or share your images.
What is the best format for web images?
WebP is the best choice for modern web images — it produces files 25-35% smaller than JPEG at equivalent quality and supports transparency like PNG. AVIF is even more efficient but has slightly lower browser support. Use JPG for maximum compatibility.
Can I remove EXIF data (GPS, camera info) from my photos?
Yes. Enable the "Remove EXIF Data" toggle in the Format tab before downloading. This strips all metadata including GPS coordinates, camera model, timestamps, and other privacy-sensitive information.
How do I run the Python backend locally?
Navigate to the backend/ folder and run: pip install -r requirements.txt && python main.py. The API starts on http://localhost:8000 and the frontend will connect automatically.

The Best Free Online Image Resizer in 2026

GeoToolsHub Image Resizer is a professional-grade, free online tool for resizing, compressing, converting and editing images directly in your browser. Powered by a Python + FastAPI backend with Pillow image processing, it delivers high-quality results comparable to desktop software like Photoshop, GIMP or PaintShop Pro — without installing anything.

Why Resize Images Online?

Large image files slow down websites, eat up storage space, and take longer to upload or share. Resizing an image to the correct dimensions for its intended use is one of the most effective ways to improve web performance. For example, uploading a 4K photo (8 MB) when you only need a 1080p thumbnail (200 KB) wastes 40× the bandwidth. Our image resizer helps you right-size every image for its destination: web, email, social media, print, or app development.

Image Resizer for Social Media

Every social media platform has specific image size requirements that change frequently. Instagram posts look best at 1080×1080 px (square), 1080×1350 px (portrait), or 1080×566 px (landscape). Facebook cover photos should be 820×312 px on desktop. Twitter / X header images are 1500×500 px. YouTube thumbnails are 1280×720 px. LinkedIn cover photos are 1584×396 px. Our 30+ built-in presets automatically resize and center-crop your image to perfect platform specifications — no guesswork needed.

Compress Images Without Losing Quality

Image compression reduces file size by removing redundant data. Our tool lets you control the compression quality (1-100%) and choose from multiple formats. WebP typically achieves 25-35% smaller files than JPEG at equivalent visual quality. AVIF can be 50% smaller. For photographs, JPEG at 80-85% quality offers the best size-to-quality ratio. For graphics, logos and screenshots with transparency, PNG lossless is the ideal choice.

Bulk Image Resizer — Process 50 Photos at Once

Our batch image resizer lets you upload up to 50 images simultaneously, apply the same settings to all (resize dimensions, output format, filters, quality), and download them all as a single ZIP archive. This is perfect for e-commerce product photos, social media content batches, portfolio preparation, or any workflow where you need consistent dimensions across multiple images.

Other Image Tools

Quick Keywords

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