Online Tools

Browser tools that just work

Every tool runs locally in your browser: no network calls, no storage, nothing uploaded.

Format / Parse

Runs locally

JSON Formatter

Format, minify and validate JSON, with errors pinned to a line number.

Runs locally

HTML Formatter

Format or minify HTML with js-beautify, adjustable indentation.

Runs locally

JS / CSS Formatter

Format JavaScript or CSS code with 2 / 4 space indentation.

Runs locally

Code Share Card

Format code and download a PNG card you can share.

Runs locally

Python Dict to JSON

Convert single-quoted Python dicts into valid formatted JSON.

Runs locally

HTTP Header Parser

Parse copied header text (Key: Value per line) into JSON or a table.

Runs locally

Cookie Parser

Parse cookie strings into a key-value table, or rebuild a cookie header.

Runs locally

JSON to SQL

Infer column types from a JSON array and generate CREATE TABLE + INSERT.

Runs locally

curl to Code

Parse a curl command into Python requests or fetch code.

Encode / Convert

Runs locally

Base64 / Hex / URL Encoding

Convert UTF-8 text to and from Base64, hexadecimal and URL encoding.

Runs locally

Base64 ⇄ Image

Turn local images into Base64 Data URLs, or preview and download Base64.

Runs locally

Smart Text Decoder

Detect and unwrap layered URL, Base64, Unicode and HTML entity encodings.

Runs locally

URL Parameter Parser

Split a URL into protocol, host, path and query params as a table or JSON.

Runs locally

Timestamp Converter

Convert between Unix timestamps and local dates, with a live clock.

Runs locally

QR Code Generate & Scan

Turn text into a QR code image, or read a QR code out of a picture.

Compare

Runs locally

JSON Diff

Structured tree comparison of two JSON documents with highlights.

Runs locally

Text Diff

Line-by-line text comparison with added and removed lines highlighted.

Other

Runs locally

SHA Hash Calculator

Compute SHA-1 / SHA-256 / SHA-512 digests with WebCrypto.

Runs locally

AES / DES Encryption

Symmetric encryption with crypto-js: AES, DES, TripleDES, mode and padding selectable.

Runs locally

Regex Tester

Live match highlighting with flags, plus a common-pattern cheat sheet.

Runs locally

Password Generator

Pick length and character sets; randomness comes from crypto.getRandomValues.