Live HTML Editor
Write HTML and see the live preview instantly. Features code beautification, syntax highlighting, and one-click export as HTML or PDF — free, no signup.
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Back to ToolNova Laboratory
Developer & Coding Studio
A high-performance workstation for software engineers. This laboratory offers precision-engineered utilities for code orchestration, API debugging, and secure data transformation. From formatting complex JSON structures to testing REST endpoints, every tool runs locally to ensure your code snippets never leave your secure environment.
REST API Tester
Test REST APIs directly in your browser. Send GET, POST, PUT, DELETE requests with custom headers and JSON bodies — a free Postman alternative.
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QR Code Generator
Generate QR codes for URLs, WiFi passwords, contact cards, and text. Add custom logos, choose colors, and download as SVG or PNG — free, no signup.
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Barcode Generator
Generate professional barcodes online. Create CODE128, EAN-13, UPC-A, and CODE39 barcodes and download as SVG or PNG — free, no server upload.
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JWT Decoder & Generator
Decode, verify, and generate JWT tokens online. Inspect payload claims, verify HMAC SHA256 signatures, and create signed tokens — all locally in your browser.
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JSON to CSV Converter
Convert JSON to CSV or CSV to JSON online. Handles nested objects, arrays, and large files — free, instant, runs locally in your browser.
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JSON Formatter
Format, validate, and minify JSON code online. Instantly prettify messy JSON, fix syntax errors, and explore data in tree view — free, no signup.
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Base64 Image Encoder
Convert images to Base64 strings for embedding in CSS or HTML. Generate data URIs for icons and logos without external HTTP requests — free, local processing.
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Developer Utilities
Essential developer tools in one place. URL encode/decode, Base64 text conversion, and live Regex testing — all running locally in your browser.
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Laboratory Standards
ToolNova's Developer & Coding Studio suite is designed for 2026 technical requirements. Unlike traditional server-side applications, we leverage browser-native computing to ensure that your sensitive data never leaves your workstation.
- 100% Client-Side Privacy
- Zero Latency Processing
- Cross-Platform Compatibility
Technical Documentation
Does ToolNova store my code?
No. All developer tools, including the HTML Editor and JSON Formatter, process data locally using WebAssembly and Javascript.
Can I test local APIs with the REST Client?
Yes, since the tool runs in your browser, it can reach localhost and internal network endpoints that cloud-based testers cannot.
Are the QR codes generated in vector format?
Yes, the QR Architect allows for high-fidelity SVG exports suitable for professional print and digital branding.