Compare semantic version numbers. Check if one version is greater than, less than, or equal to another using semver rules. Everything runs locally in your browser — nothing is uploaded.
Generate fake credit card numbers with valid formats including Visa, Mastercard, Amex, and Discover. All numbers pass Luhn algorithm validation. Everything runs locally in your browser — nothing is uploaded.
Generate serial numbers with configurable format patterns using X (hex), 9 (digit), and A (alphanumeric) placeholders. Everything runs locally in your browser — nothing is uploaded.
Check JavaScript code for syntax errors using the Function constructor. Validate code before execution. Everything runs locally in your browser — nothing is uploaded.
Calculate monthly lease payments using capitalized cost, residual value, term, and money factor. Compare lease vs buy for your next vehicle. Everything runs locally in your browser — nothing is uploaded.
Calculate your final grade using weighted assignment scores. Enter grades and their weights to compute your overall percentage. Everything runs locally in your browser — nothing is uploaded.
Semver Calculator lets you compare semantic version numbers. Check if one version is greater than, less than, or equal to another using semver rules. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Compare semantic version numbers. Check if one version is greater than, less than, or equal to another using semver rules. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Paste or type your content directly into the provided text area.
Yes. After the initial page load, Semver Calculator runs entirely on your device with no internet connection needed. All processing is done locally.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check individual tool descriptions for specifics.
No. All code processing — formatting, minification, conversion, hashing — runs locally in your browser.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. SQL uses sql-formatter, JSON uses native JSON.parse, and other formatters follow widely adopted formatting rules.
Yes. All developer tools work fully offline after the initial page load.