Image Tools
Free online image tools to pick colours, compress and resize images, and calculate aspect ratios. Fast, private, and no upload to third-party servers required.
Thank you for reading this post, don't forget to subscribe!What Are Online Image Tools?
Online image tools let you work with images directly in your browser โ picking colours, compressing file sizes, resizing dimensions, and calculating aspect ratios โ without installing software. They’re essential for web developers, designers, content creators, and anyone who works with images regularly. Every tool on this page is free, runs locally in your browser, and doesn’t upload your images to external servers unless explicitly needed for processing.
Image Color Picker
The image color picker lets you upload any image and click on it to extract the exact colour at that pixel. It shows the colour in multiple formats โ HEX, RGB, and HSL โ so you can paste it directly into CSS, design software, or any tool that accepts colour codes. It’s the fastest way to grab a colour from a logo, photograph, or screenshot without opening a full design application. Pair it with the color converter to translate between colour formats.
Image Compressor & Resizer
The image compressor and resizer reduces file size and dimensions to speed up your website or fit platform requirements. Large images are one of the most common causes of slow page load times โ and page speed directly affects both user experience and Google’s Core Web Vitals rankings. Compressing images before uploading them is one of the easiest wins for site performance.
Aspect Ratio Calculator
The aspect ratio calculator works out the proportional relationship between an image’s width and height. Enter any two dimensions and it calculates the ratio (e.g. 16:9, 4:3, 1:1) and scales the other dimension proportionally if you change one side. This is essential for resizing images or videos without distortion โ stretching changes the aspect ratio and makes content look wrong. Common ratios include 16:9 for widescreen video, 4:3 for traditional displays, 1:1 for social media squares, and 9:16 for mobile stories and reels.
Common ratios:
16:9 โ widescreen video, YouTube, monitors
4:3 โ traditional TV, iPad, presentations
1:1 โ Instagram square, profile photos
9:16 โ TikTok, Instagram Reels, Stories
3:2 โ DSLR photos, 35mm film
Why Image Optimisation Matters
Images typically account for the largest portion of a webpage’s file size. Unoptimised images slow down page loads, hurt Core Web Vitals scores, increase bounce rates, and waste bandwidth โ especially on mobile connections. Compressing and properly sizing images before uploading is one of the highest-impact, lowest-effort improvements you can make to any website. Even a 50% reduction in image file size can noticeably improve load times.
Image Formats Explained
- JPEG/JPG: best for photographs and complex images. Lossy compression โ smaller files but some quality loss at high compression.
- PNG: best for graphics, logos, and images needing transparency. Lossless compression โ larger files but perfect quality.
- WebP: modern format offering better compression than JPEG and PNG with similar quality. Supported by all modern browsers.
- SVG: vector format for icons, logos, and illustrations. Scales to any size without quality loss. Not for photographs.
- GIF: limited to 256 colours, used for simple animations. Being replaced by video formats for most uses.
Related Tools
Image work often overlaps with web development and design. The color converter translates between HEX, RGB, HSL, and other colour formats. The QR code generator creates images you can embed or print. The percentage calculator is handy for working out compression ratios. And the unit converter can convert between pixels, inches, centimetres, and other measurement units used in print and digital design.
Frequently Asked Questions
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