Private browser-based utilities
Fast online tools for developers, designers, and digital work.
Hash strings, format JSON, inspect IP addresses, encode data, generate passwords, and convert assets with clean tools that are built for speed, privacy, and search.
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Popular tools
Hash & checksums
MD5 Generator
Generate an MD5 hash from text directly in your browser. Useful for checksums, legacy systems, and quick comparisons.
Hash & checksums
SHA-256 Generator
Create SHA-256 hashes locally in the browser using the Web Crypto API.
Hash & checksums
File Checksum Generator
Generate MD5 and SHA-256 checksums for local files without uploading them.
Encoding
Base64 Encode and Decode
Encode text to Base64 or decode Base64 back to readable text in the browser.
Data formatters
JSON Formatter and Validator
Format, validate, and minify JSON locally with clear error messages.
Network & web
What Is My IP Address?
See the public IP address your browser is using to reach Lumio Utils.
Text utilities
UUID Generator
Generate random UUID v4 values in your browser.
Security helpers
Password Generator
Generate strong passwords locally without sending them to a server.
Encoding
URL Encode and Decode
Encode and decode URL components safely for query strings and APIs.
Encoding
QR Code Generator
Create QR codes locally for URLs, Wi-Fi notes, contact text, and short messages.
Structured for roaming
Categories
Hash & checksums
Generate and compare hashes for text and files without uploading sensitive data.
Encoding
Encode, decode, escape, and clean strings for URLs, HTML, APIs, and data formats.
Data formatters
Format, validate, minify, and convert structured data such as JSON, YAML, XML, and CSV.
Network & web
Inspect IP addresses, headers, DNS, certificates, and browser request details.
Image & SVG
Convert, inspect, optimize, and prepare image assets for web and mobile apps.
SEO & marketing
Preview metadata, build campaign URLs, create robots files, and validate search snippets.
Text utilities
Clean, transform, count, compare, and generate text for everyday work.
Security helpers
Generate strong passwords, inspect tokens, and safely verify checksums.
No third-party analytics scripts.
Lumio Utils is designed with internal first-party analytics. Tool inputs and file contents are not stored for analytics.
SEO pages that are useful first.
Every tool has its own landing page with the working utility, examples, FAQ, related tools, and structured content for search engines.