
What it costs
- Free tier
- Yes
Open-source collection of everyday browser tools, free to use.
Auto-checked on 8 August 2026Source
About Omatsuri
What Is Omatsuri?
Omatsuri is an open source progressive web application that provides 12 browser-based tools for frontend development tasks. Designed as a collection of utilities for everyday use in the design-tools category, Omatsuri runs entirely in the browser with full offline support and is available for free. It fits into design workflows by offering quick access to generators and converters without requiring installations or external services, emphasizing privacy through no tracking, ads, or server connections.
What Omatsuri Does
- Generates CSS triangles using a dedicated triangle generator.
- Creates color shades from input colors via the color shades generator.
- Produces linear and radial gradients with a gradient generator.
- Designs page dividers for web layouts.
- Compresses SVG files to reduce size.
- Converts SVG code to JSX format for React components.
- Encodes content to Base64.
- Generates realistic fake data for testing purposes.
- Provides a collection of HTML and CSS symbols.
- Offers ipsum text generators including Lorem, Samuel, and Poke variants.
- Displays CSS cursor properties.
- Lists JavaScript events keycodes for reference.
How Omatsuri Can Be Used
- Frontend developers use the CSS triangle generator and gradient generator during UI prototyping to create custom shapes and backgrounds without leaving the browser.
- Designers apply the color shades generator and page dividers generator to build cohesive color schemes and section separators in web projects.
- Teams compress SVGs and convert them to JSX for optimized icon integration in React applications.
- Developers encode assets to Base64 for inline embedding in stylesheets or generate fake data to populate prototypes and test forms.
- Workflows incorporate the symbols collection, ipsum generators, cursor properties, and keycodes references for rapid reference during coding sessions.
Who Is Omatsuri For?
Omatsuri serves frontend developers, UI/UX designers, and web teams handling repetitive browser-based tasks in design and development workflows. It suits users at various experience levels who need offline, privacy-focused utilities for CSS generation, SVG handling, data mocking, and reference tools without complex setups. Those working on progressive web apps or open source projects find its all-in-one structure efficient for daily tasks. Visit Omatsuri
Featured Tools
SponsoredFramer
Design and launch your dream website with no coding required.
PromptCreek
Prompt Creek is a free community-driven repository featuring thousands of AI prompts. Discover, bookmark, and share quality prompts for ChatGPT, Claude, and other AI tools.
Vatis Tech
Vatis Tech is the most powerful speech-to-text infrastructure. It can be used to transcribe user interviews and client meetings.
Your tool here
The tools above are our own picks until the slots sell.
Spotlight
SponsoredRotates dailyHyNote
Records and transcribes interviews and meetings, then turns them into summaries and action items.
Tools we recommend

getimg.ai
20+ AI models for image, video & audio in one workspace


OpenArt
All-in-one AI image, video & audio generator


YouCam Online Editor
Free online AI photo & video editor
Editorially chosen. Some links above are affiliate links — if you sign up we may earn a commission, at no extra cost to you.
More Design Tools Tools


Pryzm
Pryzm is a real-time studio for designers who need backgrounds that don't look like everyone else's. Layer procedural gradients, then stack glass, grain, light and blobs.


Modeinspect
Mode turns your product’s codebase into editable canvas frames. Refine real UI with visual controls, experiment with AI then share or hand off for review.

GoProd
Remove backgrounds and upscale images effectively.

Kittl
AI-first design platform with image, vector, and video generation, plus templates, mockups, and print-ready exports.

Lunacy
Free design software enhanced with AI tools and built-in graphics.

Smart Upscaler
Automatically improve image clarity using AI technology.
Explore Other Categories
Discover more design resources
New to Design?
Explore our comprehensive design glossary to master essential terminology from A/B Testing to Wireframes.
Browse GlossaryLooking for something specific?
Search through our entire collection of design tools and resources