Stack Online Tools is a free all-in-one web-suite offering 100+ utilities for text, code, SEO, encoding/decoding and more—built for developers, content creators and marketers.
Cost / License
- Free
- Proprietary
Platforms
- Online


Stack Online Tools is a free all-in-one web-suite offering 100+ utilities for text, code, SEO, encoding/decoding and more—built for developers, content creators and marketers.


35+ crossplatform offline tools for web developers: text analyzer with AI counter, beautifiers (SQL, JS, CSS, HTML), converters (JSON, YAML, hashes, images, etc) and generators (crontab, UUID v1-v8, xid, random text, random string, etc).




Open-source website auditing and optimization tool with AI-powered fixes, GEO/AEO analysis, and full-site crawling and auto-fixing that fixes the problems it finds without having to lift a finger.



CSS Scan Pro is a browser extension that makes it radically easy to get the looks of any website. Hover over any element, and copy its entire CSS with a single click.

Web Inspector is a powerful Chrome extension that lets you inspect elements, debug CSS, extract color palettes, and download all images from any website—right from your browser.



Collab Spot accelerates the iteration process by allowing your entire team to collaborate on any website. Create and modify designs, leave comments, make and assign to-dos, and more — all in a no-code multiplayer environment.




We create premium website themes & templates for developers, businesses, and personal use with an emphasis on simplicity, consistency, and readability.




PDFBolt is a powerful HTML to PDF API designed for developers and businesses to automate PDF generation effortlessly. It enables users to convert HTML, URLs, or raw content into pixel-perfect PDFs in seconds with Chrome-powered rendering.




SaaS boilerplate featuring authentication, admin portal, app dashboard, Stripe integration, workflows, entity builder, notifications, blog, analytics.




Strattic is a next-generation hosting company that converts WordPress websites into a static, headless architecture in a single click. It offers websites the resilience, stability, security, and performance of a static HTML site.



Ipsum Image is a placeholder image generator running completely on Google services. Available through simple and intuitive urls, the service is accessible and based on open-source code for easy self-hosting.

A browser extension that inspects any website and exports what you find straight to code: CSS, Tailwind, SVGs, Lottie animations, fonts and design tokens.




The quick and easy way to add versatile graphical interfaces with networking capabilities to your Java, Node.js, Perl, Python or Ruby programs. Give instant access to your application to whoever you want on the Internet, without having to deploy it.

FeaturePeek is a web application that lets designers leave feedback on in-progress developer implementations. Many tools today specialize in design prototyping and collaboration, but fall short after the developer-handoff stage.
AI workspace that builds real websites, tools, and apps from plain English — everything goes live instantly with its own URL.



Factor is a CMS framework designed for the unique problems faced by front-end developers when creating websites and web apps. Factor aims to help you ship apps as quickly, implement projects more concisely, spend less time debugging and avoid pitfalls.



Wolf Draft Studio helps you prototype web concepts for responsive page layouts, animation transitions, navigation menus, carousels, image galleries, slideshows and more.




A class to easily place data in DOM and update them immediately upon change. It is similar to Angular, Vue, ReactJS and alike frameworks while trying to keep the code clean and the learning curve small.
Build production-ready SaaS apps 10x faster with NextDevKit, a full-stack template using Next.js & OpenNext with auth, payment, landing page, email, storage, blog, docs, and database & native support for Vercel, Cloudflare Workers(D1, KV, R2), and AWS(Lambda, RDS).

Best Rotating Proxy & Scraping API Alternative
You don't need to spend hours to create your own IP rotation rules and pay for different services. Just use scrape.do and only pay for successful requests. It's very easy and fast!.


HCL Domino Leap (formerly HCL Domino Volt) is a no-code capability that makes it easy to develop powerful, secure, and enterprise-grade workflow-based applications. While it runs on Domino, you don’t need any specialized Domino or IT skills.




ModHeader is a powerful browser extension that provides users with complete control over HTTP(S) headers. By allowing you to modify, add, or remove headers in a simple and user-friendly interface.


Cloud platform engineered for Dart server apps with predictable pricing, instant deployment from Git or CLI, secure secret storage, and scalable Postgres database.
PocketStarter is a starter template for developers building with PocketBase. It includes authentication, payments, Next.js, and other essential tools.



