JSON
JSON Viewer
Visualize JSON in a collapsible tree view with syntax highlighting and search.
Browser-based Open Tool
100% Client-Side & Private — No Data Sent to Servers
Utility Tools — Free Online Developer & Designer Tools
Fast, free, privacy-friendly online developer tools that run directly in your web browser. 41 tools for formatting JSON, converting data, manipulating images, and editing text.
Free Online Developer Utility Tools(41 total)
JSON
JSON Formatter & Minifier
Pretty-print or minify JSON with instant validation and error messages.
Browser-based Open Tool
Text
Base64 Encode / Decode
Encode text or files to Base64 and decode Base64 back to text or binary.
Browser-based Open Tool
Text
URL Encode / Decode
Percent-encode and decode URLs with support for full and component encoding.
Browser-based Open Tool
Web & Dev
UUID Generator
Generate v4 UUIDs in bulk with copy-to-clipboard and format options.
Browser-based Open Tool
Web & Dev
Timestamp Converter
Convert Unix timestamps to human-readable dates and back, with timezone support.
Browser-based Open Tool
Text
Case Converter
Convert text between camelCase, snake_case, kebab-case, PascalCase, and more.
Browser-based Open Tool
Text
Lorem Ipsum Generator
Generate placeholder text by words, sentences, or paragraphs.
Browser-based Open Tool
JSON
JSON Compare
Compare two JSON objects side-by-side with diff highlighting and key-order toggle.
Browser-based Open Tool
JSON
JSON Schema Validator
Validate JSON against a schema with detailed error paths.
Browser-based Open Tool
JSON
JSON to TypeScript
Generate TypeScript interfaces from a JSON sample.
Browser-based Open Tool
JSON
JSON ↔ CSV
Convert JSON to CSV and CSV back to JSON.
Browser-based Open Tool
Why Choose Our Free Online Developer Utility Tools?
At utilitiestools.net, we provide a complete suite of fast, reliable, and privacy-first online developer tools engineered specifically for modern software engineers, web developers, content creators, and UI/UX designers. Every single utility tool in our collection operates 100% locally inside your web browser using WebAssembly and client-side JavaScript APIs. Your data, source code, API keys, JSON payloads, and uploaded media files are never transmitted to external remote servers, ensuring maximum privacy and data security.
JSON & Data Tools
Format, minify, validate, and convert JSON payloads instantly with interactive collapsible tree views, color syntax highlighting, and fast error diagnostics.
Text & Formatting Tools
Clean, transform, diff, encode, and decode text instantly. Includes Base64 converters, URL encoders, word counters, line sorting tools, and case converters.
Image & PDF Tools
Compress, resize, merge, and split PDF documents and images locally without quality degradation or server upload wait times.