Utilities converters

Utilities

Choose a converter, upload a file or paste text, and download the result. Files delete after 1 hour.

URL Encoded URLCampaign URL Tracked URLLong URL Short URLDomain WHOISIP address IP infoColor FormatsBase color PaletteColors ContrastColors CSS GradientColor Color valuesJWT Decoded tokenTimestamp DateUUID options UUIDsCSS Minified CSSHTML Minified HTMLJavaScript Minified JSImage Base64Text or URL QR PNGImage Base64
Related tools:Base64 EncodeBase64 DecodeMarkdown to HTML

What the tools do

Most of these tools run in your browser. URL Encoder encodes plain text completely with encodeURIComponent, but keeps a full web address intact and only encodes its path. UTM Builder adds utm_source, utm_medium, utm_campaign, utm_term and utm_content, draws a QR code of the result and keeps the last ten tagged URLs you save. JWT Decoder shows the header, the payload and whether the token has expired, without checking the signature. UUID Generator makes up to 100 version 1, 4 or 5 UUIDs at once.

The JavaScript minifier runs Terser and the HTML minifier runs html-minifier-terser. The CSS minifier works with text patterns: it removes comments and whitespace and shortens hex colors, zero units and repeated margin and padding values, but it doesn't remove unused rules.

Color Converter reads HEX, rgb(), hsl(), hsv(), cmyk() and CSS color names and shows the color in all of those formats. Palette Generator turns one base color into three to five colors with six harmony rules, Contrast Checker tests two colors against the WCAG contrast ratios, and Gradient Generator writes linear, radial and conic CSS gradients. Color Picker can sample any pixel on your screen in Chrome, Edge and Opera on desktop.

Five tools send what you enter to our server. Link Shortener makes a convert.astroworldmc.com/s/ link with a six-character code, and without a Basic or Pro plan that link stops working after 30 days. QR Code Generator makes a code that points to a convert.astroworldmc.com/r/ redirect and logs the country and device type of every scan. WHOIS Lookup asks the WHOIS servers and keeps each answer for an hour, and IP Lookup gets the location and provider of an address from ip-api.com. Image to Base64 uploads a picture and returns its data URI as a text file, while Base64 Image does the same in your browser.

Frequently asked questions

Does the JWT decoder check whether a token is valid?

No. It decodes the header and payload and compares the expiry time with your clock, but it never verifies the signature. A token that decodes cleanly can still be forged or tampered with.

How long do short links last?

Links made without a Basic or Pro plan stop working 30 days after you create them and then lead to the Convert home page. Links made on a Basic or Pro plan don't expire.

Can I change where a QR code points after printing it?

Only for codes you made while signed in on a Basic or Pro plan. The printed code contains a convert.astroworldmc.com/r/ address, and you change the destination behind it in the Your QR Codes list. A code made without a plan keeps the address it was created with.

Why does IP Lookup show the wrong city?

An IP address isn't tied to a physical place, so ip-api.com can only estimate where it is used. Mobile networks and VPNs often send traffic through a gateway in another city, so the city can be far off even when the country is right.