# OpenToolLab

> Free, private, in-browser developer tools. 100% client-side processing — your data never leaves your device. No signup, no uploads, works offline.

Homepage: https://opentoollab.com

## Tools

- [JSON Formatter](https://opentoollab.com/tools/json-formatter): Format, validate, and beautify JSON locally with syntax highlighting and instant error detection.
- [Regex Tester](https://opentoollab.com/tools/regex-tester): Test and debug regular expressions in real time with plain-English pattern explanations and presets.
- [Base64 Encoder / Decoder](https://opentoollab.com/tools/base64-encoder): Encode and decode Base64 for text, images, and files up to 100MB with drag-and-drop.
- [UUID Generator](https://opentoollab.com/tools/uuid-generator): Generate UUIDs (v4/v5/GUID) in bulk, copy as JS, JSON, SQL, or Python.
- [Case Converter](https://opentoollab.com/tools/case-converter): Convert text between 7 case styles with voice input and bulk line processing.
- [Lorem Ipsum Generator](https://opentoollab.com/tools/lorem-ipsum-generator): Generate placeholder text with paragraph, sentence, and word control plus HTML output.
- [Password Generator](https://opentoollab.com/tools/password-generator): Generate strong passwords with a live entropy meter and passphrase mode, entirely in-browser.
- [Color Palette Generator](https://opentoollab.com/tools/color-palette-generator): Generate harmonious color schemes with WCAG contrast checks and Tailwind export.
- [Hash Generator](https://opentoollab.com/tools/hash-generator): Generate MD5, SHA-1, SHA-256, and SHA-512 hashes for text or files.
- [URL Encoder / Decoder](https://opentoollab.com/tools/url-encoder): Encode text for URLs and decode percent-encoded strings with query parsing.
- [Timestamp Converter](https://opentoollab.com/tools/timestamp-converter): Convert Unix timestamps to/from dates in seconds, milliseconds, and ISO 8601.
- [HTML Entity Encoder](https://opentoollab.com/tools/html-entity-encoder): Escape and unescape HTML entities, including numeric entities.
- [Unit Converter](https://opentoollab.com/tools/unit-converter): Convert 220+ units across length, weight, temperature, volume, area, and speed.
- [SVG to PNG Converter](https://opentoollab.com/tools/svg-to-png-converter): Rasterize SVG to PNG with custom size, scale, and background options.
- [String to Hex Converter](https://opentoollab.com/tools/string-to-hex): Convert strings to hex and back with delimiters and case control.
- [Base64 Image Encoder](https://opentoollab.com/tools/base64-image-encoder): Convert images to Base64 data URLs and preview them back as images.
- [YAML to JSON Converter](https://opentoollab.com/tools/yaml-to-json): Convert YAML to JSON and JSON to YAML, including config and OpenAPI specs.
- [JSON to TypeScript Converter](https://opentoollab.com/tools/json-to-typescript): Generate typed TypeScript interfaces, types, and classes from JSON.
- [JSON to Dart Converter](https://opentoollab.com/tools/json-to-dart): Generate null-safe Flutter model classes with fromJson and toJson from JSON.
- [JSON to Kotlin Data Class Converter](https://opentoollab.com/tools/json-to-kotlin): Generate @Serializable Kotlin models with kotlinx.serialization from JSON.
- [JSON to Swift Codable Converter](https://opentoollab.com/tools/json-to-swift): Generate Swift Codable structs with CodingKeys from JSON.
- [JSON to Excel Converter](https://opentoollab.com/tools/json-to-excel): Convert JSON arrays to downloadable .xlsx files with a live preview.
- [HTML to JSX Converter](https://opentoollab.com/tools/html-to-jsx): Convert HTML to React components or JSX markup automatically.
- [Morse Code Translator with Audio](https://opentoollab.com/tools/morse-code-translator-audio): Convert text to morse and play or download the signal as a WAV file.
- [Morse Code Image Generator](https://opentoollab.com/tools/morse-code-translator-image): Convert text to morse and export the signal as a PNG image.
- [QR Code Generator](https://opentoollab.com/tools/qr-code-generator): Generate free QR codes with custom colors, shapes, logo, and PNG/SVG/PDF export.

## Pages

- [About](https://opentoollab.com/about)
- [Privacy Policy](https://opentoollab.com/privacy)
- [Terms & Conditions](https://opentoollab.com/terms)
- [Contact](https://opentoollab.com/contact)

## Privacy

All tools run 100% client-side. No data is ever uploaded, stored, or tracked. Verify in your browser's Network tab.