Dev Tools bronze

Base64 Encoder

Encode UTF-8 text to a Base64 string.

• {"text":"hello world"}

Base64 Decoder

Decode a Base64 string back to UTF-8 text.

• {"text":"aGVsbG8gd29ybGQ="}

URL Encoder

Percent-encode text for safe use in a URL.

• {"text":"a b&c=d"}

URL Decoder

Decode a percent-encoded URL component back to text.

• {"text":"a%20b%26c%3Dd"}

UTF-8 Encoder

Encode text into its UTF-8 byte representation as hex, decimal, or binary.

• {"text":"héllo","format":"hex"}

UTF-8 Decoder

Decode UTF-8 bytes (hex, decimal, or binary) back into text.

• {"text":"68 c3 a9 6c 6c 6f","format":"hex"}

JSON Formatter

Repair and pretty-print JSON with a chosen indent size (2, 4, or 8).

• {"text":"{\"b\":2,\"a\":1}","indentSize":2}

CSV to JSON

Convert CSV text into a JSON array of row objects.

• {"csv":"a,b\n1,2","delimiter":","}

CSS Formatter

Beautify or minify CSS.

• {"text":"a{color:red}","action":"beautify"}

HTML Formatter

Beautify (format) or minify HTML.

• {"html":"<div><p>hi</p></div>","action":"format"}

Diff Viewer

Compute a line-by-line diff between two text blocks.

• {"original":"a\nb","modified":"a\nc"}

JWT Decoder

Decode a JWT into its header and payload (no signature check).

• {"token":"eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjMifQ.sig"}

Hash Generator

Compute MD5, SHA-1, SHA-2, and SHA-3 digests of the given text.

• {"text":"hello"}

Shasum

Compute SHA checksums of the given text.

• {"text":"hello"}

Color Converter

Convert a HEX color into RGB, HSL, and HSV representations.

• {"hex":"#3b82f6"}

Timestamp Converter

Convert a Unix timestamp to an ISO date, or an ISO/parseable date to a Unix timestamp. Provide exactly one of `timestamp` or `date`.

• {"timestamp":1700000000}

Size Unit Converter

Convert a length between units (px, in, cm, mm, m, km, ft, yd, mi, pt, pc, em, rem, vw, vh).

• {"value":16,"fromUnit":"px","toUnit":"pt"}

UUID Generator

Generate one or more UUIDs (v4 or time-ordered v7).

• {"version":"v4","count":1}

Cron Builder

Validate a cron expression and describe its next run times in plain language.

• {"cronExpression":"0 9 * * 1-5","action":"getNextRuns"}

Country Code Lookup

Look up an ISO 3166-1 country by its alpha-2/alpha-3 code or by name. Provide exactly one of `code` or `name`.

• {"code":"US"}

IP Lookup

Geolocate an IP address (country, region, city, ISP, ...).

• {"ip":"8.8.8.8"}

My IP

Return the caller's public IP address and request metadata as seen by the server.

Share Content

Publish a text snippet and get a permanent shareable link. Set type to "markdown" or "mermaid" to have the share page render it as formatted HTML or a diagram. Anonymous shares are immutable and capped at 1 MB; fetch the raw text later from GET /api/share-content/<id>?format=text.

• {"content":"hello from an agent","title":"greeting"}