SVG to PNG converter
Paste SVG markup or upload an SVG file, preview it, and export a PNG directly in the browser.
Fast online tools
Fast online tools that are easy to use on mobile
500.lv brings together fast, focused tools for formatting, converting, checking, and everyday problem-solving.
Every tool is designed to be quick on mobile, simple to understand, and useful the moment you open it.
Popular tools
JSON formatter and validator
Format, minify, and validate JSON in the browser with clear feedback and one-click copy.
Base64 encoder and decoder
Encode plain text to Base64 or decode Base64 back to text with quick copy actions.
Word counter
Count words, characters, spaces, lines, and paragraphs with a live update as you type.
Text difference checker
Compare two text blocks in line mode or word mode with whitespace and case toggles.
PNG to WebP converter
Convert PNG images to WebP in the browser, preview the result, and fine-tune quality before download.
Image resizer
Resize images by width or height, preserve aspect ratio, and download the result directly in the browser.
QR code generator
Create downloadable QR codes from text or URLs and export them as PNG or SVG.
Hex to RGB color converter
Convert hex colors to RGB or RGBA and see a live swatch while you work.
A/B test significance calculator
Compare two variants using visitors and conversions to estimate uplift, z-score, p-value, and significance.
Sample size calculator for conversion tests
Estimate the required sample size per variant from baseline rate, minimum detectable effect, confidence, and power.
Unix timestamp converter
Convert Unix seconds, Unix milliseconds, and readable datetimes with UTC and local time toggles.
JPG to PNG converter
Convert JPG or JPEG images to PNG in the browser with a quick preview and download.
Slug generator
Turn titles or text into lowercase, hyphenated URL slugs that are easier to publish and share.
Multivariate test calculator
Compare three or more variants by visitors and conversions, review rates, and identify the current leader.
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