JavaScript Page & Image Watermarks – watermark-js-plus
Use watermark-js-plus to watermark HTML containers, create custom grids, and update or remove marks at runtime with vanilla JavaScript.
Image
Compressly: Client-Side Image Compression & Resize in JavaScript
Resize and compress uploaded photos with Compressly. Control image quality, dimensions, and JPEG, WebP, or PNG output.
Cropper.js: JavaScript Image Cropper with Zoom & Rotate
Crop images in JavaScript with Cropper.js. Set aspect ratios, zoom, rotate, resize selections, and export cropped canvas output.
OpenSeadragon: Zoomable Image Viewer in JavaScript
Display IIIF, DZI, Zoomify, TMS, and standard image files in a JavaScript image viewer with touch gestures and custom controls.
Dither Images for E-Paper Displays in JavaScript – EPD Optimize
A JavaScript library that reduces, tone-maps, and dithers images for color e-paper displays using calibrated palettes in browser or Node.js.
Deterministic 3D SVG Avatar Generator for JavaScript, React, and Vue – Planet Avatar
Create repeatable planet-style SVG avatars for user accounts, team lists, comments, and placeholder profile UIs. Works with vanilla JS, React, and Vue.
Generate Deterministic PNG Avatars from Any String – quick-avatar
Generate stable PNG profile avatars from user IDs, emails, or names, with CDN URLs, React usage, and Node output.
Fast Gaussian Blur for Canvas Image in JavaScript – glur
A vanilla JavaScript Gaussian blur library to create blur previews, sliders, and worker based image effects.
Seed-Based Dithered SVG Avatar Generator for JS & React – dither-avatar
Create repeatable SVG avatars from names, emails, or IDs with deterministic dither patterns for profiles and user lists.
Accessible GIF Image Player In Vanilla JavaScript – Gifa11y
A Vanilla JavaScript library that adds configurable, accessible play/pause buttons to animated Gif/WebP images.