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Practical tools for everyday digital work, right in your browser
Write and preview a document in Markdown, compare two versions of a text, clean up and filter a spreadsheet export, check how a page will look in search results, stay focused with timed work sessions, or format and test data. Every tool opens instantly and can be launched from the command palette with Ctrl + K. Learn more about UtiliStudio →
Tools in the workspace
Development
- Developer Utilities — A unified workbench of daily developer tools. Encode data, inspect JSON Web Tokens, compute cryptographic hashes, test regex patterns, and convert timestamps.
API
- REST Client — Build, send, and test HTTP, GraphQL, and WebSocket requests. Import collections from Postman, Insomnia, Bruno, or a cURL command, organize them in folders, and inspect every response in detail.
Data
- JSON Formatter — Format, validate, beautify, and inspect JSON in real time. Clear error highlighting, nested object indentation, and browser-based processing.
- Data Workspace — Explore and filter tabular datasets with a high-performance virtualized grid. Supports delimiter detection, multi-column search, sorting, and export.
- JSONPath Tester — Query, filter, and extract nested data from JSON documents with declarative JSONPath expressions. Real-time evaluation with syntax guidance.
- JSON Schema Validator — Validate JSON payloads against JSON Schema specifications. Get precise error reporting with JSON pointers, line numbers, and schema auto-generation.
- YAML/JSON Converter — Convert configuration files and structured data between YAML and JSON. Features bidirectional conversion, syntax validation, and formatting options.
- JSON/CSV Converter — Transform data between tabular JSON arrays and CSV documents. Supports customizable delimiters, nested property flattening, and automatic data type inference.
Documents
- Markdown Preview — Write Markdown and inspect rendered output side by side. Includes live word count, reading time estimates, table rendering, and HTML export.
- Markup Viewer — Format, validate, and inspect HTML and XML documents in a dedicated workspace. Features syntax error detection, tree inspection, and safe preview.
- Diff Viewer — Spot differences between text files, configuration snippets, and structured payloads. Features side-by-side split view, intra-line highlighting, and JSON normalization.
SEO
- SEO Utilities — Inspect and preview search engine and social media metadata. Features Google SERP snippet previews, Open Graph generation, and robots.txt analysis.
Utilities
- UUID Generator — Get a fresh UUID, also called a GUID, the moment the page opens and copy it in one click. Uses the browser Web Crypto API and supports versions 1, 4, 6, and 7, bulk creation up to 10,000 IDs, and export.
- Focus Timer — Support structured work intervals with customizable focus and break sessions. Features audio chimes, tab title countdowns, and an immersive full-screen mode.
Why use UtiliStudio
Local processing by design. Formatting, conversion, validation, and generation tools do their work in your browser, which matters when the payload is a production API response, a customer record, or an internal configuration file.
One consistent workspace. Each tool follows the same layout: input on one side, results on the other, with copy, download, and clear actions in the same place. Once you learn one tool, you know them all.
Built for real payloads. The JSON Formatter and REST Client use Monaco, the editor engine behind Visual Studio Code, with syntax highlighting, folding, and error markers, so large and deeply nested documents remain readable and fast to work with.
Works with your network. The REST Client can reach public APIs, local development servers, and VPN-only services, so you can test the same endpoints you work with every day.
Frequently asked questions
Where is my content processed?
Tools such as the JSON Formatter, UUID Generator, Markdown Preview, and the format converters process your input locally in your browser. Product analytics are designed to record which tools are used rather than the content you type into them. The Privacy Policy describes the details for each kind of tool.
How do I get started?
Open any tool from the list above or press Ctrl + K and type what you need. Preferences such as theme, favorite tools, and recently used tools are kept in your browser, so the workspace remembers how you like to work.
How does the REST Client reach localhost or internal APIs?
It sends requests directly from your browser, and an optional browser extension lets it reach localhost, VPN, and CORS-restricted APIs from your own machine. See the extension setup guide.
Which browsers can I use?
UtiliStudio runs in modern desktop browsers, and the workspace adapts to tablet and phone screens. The optional network-bridge extension installs in Chromium-based desktop browsers such as Chrome, Edge, and Brave.
For step-by-step help, read the documentation, or review how we handle data in the Privacy Policy.