Free Online Tools For Professionals

Need to sanity‑check an auth issue quickly? This JWT decoder unpacks header and payload instantly so you can confirm alg, iss, aud, exp, and custom claims. Decode tokens safely in‑browser, view raw segments or pretty JSON, and use the JWT validator hints to spot expired or malformed tokens without sharing secrets. Tip from practice: I start with a JSON validator to catch easy issues, then iterate in the same tab. Everything runs locally in your browser for privacy.

USD currency converter and dollar currency exchange with live ECB rates. Convert USD to EUR and 30+ currencies, euro convert calculator with historical charts, and comparison tools for international money conversion.

Generate JSON Web Token (JWT) with custom claims, authentication tokens, and jwt token creation using HMAC, RSA, and ECDSA signing algorithms for secure oauth and API authentication. Tip from practice: I start with a JWT generator to catch easy issues, then iterate in the same tab. Everything runs locally in your browser for privacy.

Turn that wall of unreadable JSON into something a human can actually parse. This tool catches the usual suspects: missing quotes, trailing commas, weird Unicode characters that break everything. Works with regular JSON and JSONC (the one with comments). Your API responses become readable, your config files make sense, and you stop wondering why that POST request keeps failing. Tip from practice: I start with a JSON validator and JSON formatter to catch easy issues, then iterate in the same tab. Everything runs locally in your browser for privacy.

• Format and beautify JSON with custom indentation
• Validate JSON syntax and detect errors
• Support JSONC (comments, trailing commas, single quotes)
• Minify JSON for production

When logs or SOAP responses show up as one long line, this XML formatter makes them readable fast. Pretty‑print, validate, minify, or convert to JSON with namespace‑aware parsing. Sort attributes, strip comments or empty nodes, and get precise error diagnostics — quick XML parsing in the browser, no uploads. Tip from practice: I start with a JSON validator and JSON formatter to catch easy issues, then iterate in the same tab. Everything runs locally in your browser for privacy.

Need to encode binary data for an API, or decode that mysterious Base64 string someone sent you? This tool handles both directions. Supports regular and URL-safe encoding (the kind that will not break when used in URLs). Drop in files, text, whatever - it just works. Tip from practice: I start with a Base64 encoder and Base64 decoder to catch easy issues, then iterate in the same tab. Everything runs locally in your browser for privacy.

Convert XML to JSON format with xml extract and xml get functionality. Parse any XML file format, xml search elements, with customizable parsing options and namespace support. Tip from practice: I start with a JSON formatter and XML formatter to catch easy issues, then iterate in the same tab. Everything runs locally in your browser for privacy.

Stop debugging broken URLs because of unescaped spaces and special characters. This tool properly encodes URLs and query parameters so they actually work in browsers and APIs. Handles the space encoding choice (+ vs %20) and knows the difference between full URLs and URL components. Tip from practice: I start with a URL encoder and URL decoder to catch easy issues, then iterate in the same tab. Everything runs locally in your browser for privacy.