Free Developer & Data Conversion Utilities
Decode JSON Web Tokens (JWT), parse Cron schedules, validate Schema.org JSON-LD structured data, convert base numbers, generate 1D/2D barcodes, and create robots.txt / llms.txt crawler policies.
Available Diagnostics & Tools
JWT Decoder & Signer Tool | iN2 Tools →
Validate, edit, and sign JSON Web Tokens locally with HMAC HS256 key configuration.
Cron Expression Parser & Schedule Explainer | iN2 Tools →
Parse 5-field cron schedules into plain English, calculating the next 5 job runtimes relative to system clock.
Structured Data & Schema.org Validator | iN2 Tools →
Validate JSON, XML, and YAML schemas, format code, and convert between structured data formats.
SEO Meta Tag Generator & Social Previewer | iN2 Tools →
Create optimized search engine meta tags and social share cards (Open Graph, Twitter) with real-time Google, Facebook, and X previews and an automated SEO checklist.
Robots & LLM Crawler Policy Generator | iN2 Tools →
Generate custom robots.txt files and llms.txt crawler policies, and validate directory path access against search crawlers and AI bots.
ASCII Character & Hex Map Translator | iN2 Tools →
Interactive reference table of the ASCII character set, featuring conversions between Decimal, Hex, Octal, Binary, and HTML entities with a real-time translator.
Base Number Converter (Binary, Hex, Dec) | iN2 Tools →
Convert numbers in real-time between binary, octal, decimal, hexadecimal, and custom bases.
Realistic File Transfer Calculator | iN2 Tools →
Estimate real-world file transfer times by accounting for file counts, storage protocol delays, and physical line overheads (MTU vs. serial framing).
VPN & MTU/MSS Overhead Calculator | iN2 Tools →
Calculate the effective Maximum Segment Size (MSS) from your MTU, accounting for IP headers, TCP headers, and various network encapsulations.
Datacenter Power & Cooling Planner | iN2 Tools →
Plan AC electrical loads, N+N breaker failover safety margins, UPS battery capacity, and altitude-adjusted environmental heat/airflow.
Epoch Unix Timestamp Converter | iN2 Tools →
Convert Unix epoch timestamps in seconds or milliseconds to human-readable local and UTC datetime strings, and translate datetimes back to timestamps.
QR Code Generator & Styling Suite | iN2 Tools →
Generate customizable QR codes for URLs, Wi-Fi access, vCards, SMS, and plain text with error correction controls, high-resolution PNG/SVG downloads, and custom colors.
1D Barcode Suite & Code 128 Generator | iN2 Tools →
Generate 1D industrial barcodes including Code 128, EAN-13, UPC-A, Code 39, ITF-14, Codabar, and EAN-8 with custom dimensions, check digits, and SVG/PNG exports.
2D Matrix Code & Data Matrix Suite | iN2 Tools →
Generate 2D matrix and optical codes including Data Matrix, PDF417, MicroPDF417, Aztec Code, MaxiCode, JAB Code, DotCode, Code One, and GS1 Composite Code.
Color & Pantone Converter Suite | iN2 Tools →
Real-time color conversions (Hex, RGB, HSL, CMYK), WCAG contrast analyzer, and closest Pantone Matching chip finder.
Favicon & App Icon Generator | iN2 Tools →
Create a multi-resolution favicon.ico file and custom app icon ZIP bundle by uploading an image or drawing on our pixel grid canvas.