Muryo Tools 
When you’re working online, do any of these situations sound familiar?
- “I need to convert an Excel table to plain text.”
- “I want to reduce a file’s size.”
- “I need a password — right now.”
Searching for a dedicated app every single time is tedious, and you risk stumbling onto sketchy websites. If you could find all the browser-based tools you need in one trusted place, that alone would solve the problem.
This article lists “online toolkit sites” — collections of useful tools that require no sign-up and are completely free to use.
About This Article
Every site listed here meets the following criteria:
- Free to use (any limitations on specific features are noted individually)
- No registration required (some tools may offer optional sign-up)
- Runs entirely in a browser (no app installation needed)
New sites will be added on a regular basis.
General-Purpose
These sites bring together tools of all kinds under one roof, regardless of category or use case. They’re worth bookmarking as your go-to starting point whenever you need something.
Simon Willison’s Tools
A collection of HTML + JavaScript tools built mostly with the help of LLMs, maintained by Simon Willison — a well-known figure in the developer community. From image conversion and PDF comparison to timestamp conversion and GitHub API utilities, the tools are technical and wide-ranging in scope.
10015.io
A free, all-in-one toolbox designed to replace a shelf full of bookmarks. Tools span seven categories — text, image, CSS, coding, color, social media, and more — all accessible from a single, clean interface. Browser extensions for Chrome and Firefox put every tool just one click away.
Awesome Tools
A multi-purpose site with tools for date and time calculations, text diff checking, QR code generation, image resizing, cropping, and more. The menu is in English, but the interface is button-driven and immediately usable.
LAZE SOFTWARE
A site offering a wide variety of tools organized into six categories — from lotteries, counters, and random number generators to password generation, QR code creation, image conversion, and time calculations — all free of charge.
Rakko Tools
A well-rounded toolkit with many tools for web-related research — including page heading extraction, OGP checking, Whois lookup, and DNS record lookup. Also covers word count, Base64 encoding, JSON formatting, and image compression. The interface is clean and makes it easy to find what you need.
LUFT Tools
A wide-ranging site covering text processing (full-width/half-width conversion, letter case conversion, character count), tax calculations, income tax, and file processing — plus a generous selection of personality and horoscope diagnostic tools.
AMIX Web Tools
A site covering tools across text processing, development, and design — including text diff checking, JSON formatting, color code conversion, and WebP conversion. Also includes color palette generators, contrast ratio checkers, and freelance business support tools such as design fee simulators.
Piliapp
A browser-based site for converting and processing PDFs, images, and files — alongside tools like a Pomodoro timer, roulette, and password generator. Supports HEIC to JPG conversion, with all processing handled locally in the browser without any file uploads.
Boost Tool
A site specializing in data conversion and formatting — including bidirectional conversion between Excel, CSV, and HTML tables, Markdown table creation and PDF export, batch image resizing, and WebP conversion. Also supports graph creation (pie, line, bar) and Markdown table of contents generation.
Specialized
These sites focus on a specific domain or use case and offer a rich set of tools within it.
For Web Designers & Developers
Web ToolBox
A web design and development-focused site with 78 tools — from web analytics tools like OGP checkers and heading extractors, to JSON formatting, color code conversion, and WebP conversion. Also includes visual generators for CSS border radius and gradients.
DevToolKits.app
A practical developer and DevOps toolkit — including SQL-to-ER diagram conversion, a Curl converter, a Chmod calculator, JSON-to-TypeScript type generation, and JSON-to-Zod schema tools that support modern development workflows.
ToolBox
A free online toolkit for developers and designers, offering 168+ tools across seven categories: text, developer, converter, generator, image, web, and design. Most tools run entirely in the browser with no tracking, and the site works offline as well.
Others
SEO Studio Tools
A comprehensive platform offering 200+ free tools across 11 categories: text, YouTube, SEO, domain/IP, website management, web development, image editing, calculators, unit converters, binary converters, and more.
ASCII Art Archive — Tools
A specialized site for creating, converting, and editing ASCII art. Tools range from image-to-ASCII and text-to-ASCII conversion to a drawing studio, maze generator, border maker, divider maker, and ANSI art viewer.
ToolGenius
A simple, focused tool for converting between CSV, JSON, and Excel (XLSX) formats. All four conversion directions are covered, and every conversion runs entirely in your browser — your data never leaves your device.
Wrapping Up
If you’ve ever found yourself searching for the same kind of tool over and over — and occasionally landing on sketchy pages — bookmarking a few of the sites listed here should save you the hassle.
New sites will continue to be added.