Open beta · privacy-first

Developer tools that just work.

Convert, format, encode, decode — everything runs in your browser. No data ever leaves your device.

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Why ShareTools

Instant

Everything is pre-rendered and runs locally. No network round-trips for conversions.

Private

Your input never leaves the browser. Zero telemetry on tool content.

Personal workspace

Pin your favorite tools to a private workspace. Your preferences are saved locally and ready when you are.

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All tools

Formatters & Validators

SQL Formatter & Beautifier - Format SQL Queries Online

Format and beautify SQL queries with support for 20+ dialects including MySQL, PostgreSQL, SQLite, and more. Fully local, instant output.

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JSON Formatter & Validator - Pretty Print JSON Online

Format, beautify, minify, and validate JSON in your browser. Detailed error positions, configurable indent, sort keys, and one-click copy.

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Converters

CSV ↔ JSON Converter - Flat and Nested Data Converter

Convert CSV to JSON and JSON to CSV instantly. Support for nested flattening, custom delimiters, and smart type parsing completely in-browser.

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JSON to JSON Schema & LLM Structured Output Generator

Convert mock JSON to JSON Schema and compile adapters for OpenAI Strict Structured Outputs, Gemini responseSchema, and Anthropic Tools.

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JSON ↔ YAML Converter - Convert JSON to YAML Online

Convert JSON to YAML and back. Bidirectional, in-browser, with indent control and type-safe round-trips.

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Properties ↔ YAML Converter - Online Spring Boot Config Tool

Convert Java .properties files to YAML and back. Bidirectional, in-browser, with dot-key nesting, array support, and type inference.

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JSON ↔ Properties Converter - Nest JSON Config Online

Convert JSON to Java .properties and back. Bidirectional, in-browser, with dot-key nesting, array support, and type inference.

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Online Color Converter - HEX, RGB, HSL, CMYK Color Picker

Convert colors between HEX, RGB, HSL, HSV, and CMYK formats instantly in your browser. Features a live color picker, contrast checker, and bulk copy.

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Number Base Converter - Binary, Decimal, Hex Online

Convert numbers between binary, octal, decimal, hex, base32, and base64 formats instantly in your browser. Supports arbitrary-precision big integers.

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Markdown ↔ HTML Converter - Convert Markdown Online

Convert Markdown to HTML and HTML to Markdown instantly in your browser. Live preview, one-click copy, and fully local processing.

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Unix Timestamp ↔ Date Converter - Epoch Time Converter

Convert between Unix timestamps and human-readable dates. Side-by-side local-time and UTC views with a one-click Now button, fully client-side.

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Encoders & Decoders

Base64 File & Text Encoder/Decoder - Online Converter

Convert files (images, PDFs, fonts) or text to Base64 strings and decode them back. Zero server uploads, 100% private in-browser tool.

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Online Hash Generator - Generate MD5, SHA-256 & SHA-512

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text. Runs entirely in your browser — no data sent to any server.

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JWT Decoder & Verifier - Decode JSON Web Tokens Online

Decode JSON Web Tokens in your browser. Inspect header, payload, expiry, and standard claims. Decoding only — no signature verification, no upload.

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Base64 / URL Encode & Decode - Online Converter Tool

Encode and decode Base64, Base64URL, and URL-encoded (percent-encoded) text in your browser. Unicode-safe, instant, zero upload.

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Generators

AI Prompt Builder & Structural Prompt Generator

Create structured AI prompts with automatic variable forms, XML tag encapsulation, token estimation, and model-specific optimization adapters.

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Online UUID Generator - Generate Random UUID v4 & v7 Keys

Generate random UUID v4 or time-ordered UUID v7 values instantly in your browser. Supports custom quantities, bulk copy, and various format tweaks.

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Free QR Code Generator - Generate QR Codes Online

Generate QR codes from any text or URL right in your browser. Customizable size, error correction, and one-click PNG download.

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Cron Expression Generator - Visual Cron Builder Online

Build, visualize, and understand cron expressions. Features a visual grid, human-readable description, next executions, and platform code generation.

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Text Utilities

Regex Tester & Explainer - Test Regular Expressions Online

Test and explain JavaScript regular expressions in real-time. Match highlighting, capture groups, and plain-English explanations.

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Online Diff Checker - Compare Text Files & Find Differences

Compare two texts side by side or in unified view. Line-by-line add/remove highlighting with instant results — fully client-side.

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