OmniCalcsDeveloper Tools
Free developer tools for JSON, passwords, hashes, colors, networks and code helpers.
JSON Formatter & Validator
Pretty-print, validate and minify JSON.
Password Generator
Strong random passwords with strength meter.
HEX/RGB Color Converter
Two-way color code conversion with preview.
Number Systems Converter
Decimal, binary, octal and hex.
SHA-256 Hash Generator
Secure hash for any input text.
What Is My IP
Your public IP and browser details.
Subnet Calculator (IPv4)
Network, broadcast and host ranges.
.htaccess & Robots.txt Generator
Config files in seconds.
Timestamp Converter
Unix time to date and back.
UUID Generator
RFC 4122 v4 UUIDs in bulk.
HTML Minifier
Minify HTML and see bytes saved.
CSV to JSON Converter
Convert spreadsheets to objects.
HTML Entity Encoder
Escape or unescape HTML characters.
About Developer Tools
Free developer tools for JSON, passwords, hashes, colors, networks and code helpers.
Every tool runs entirely in your browser — instant results, no sign-up, no data sent to any server. All formulas are standard and published so you can verify the math yourself.
Frequently Asked Questions
Are these tools really free?
Yes. Every developer tool on OmniCalcs is 100% free with no registration, and always will be.
Do I need to install anything?
No. All calculators run in your browser with pure HTML, CSS and JavaScript — nothing to download.
How accurate are the results?
Each tool uses standard, published formulas shown on its page, so you can verify every result yourself.