Encoders & Converters

15 free tools · runs in your browser

Base64, URL, hash, binary, JSON/YAML/CSV converters and number-base tools — all running instantly in your browser. Like every tool on BrowserTools, these are free, require no signup, and process everything locally on your device.

Base64 Encoder / Decoder

UTF-8-safe Base64 encode and decode

URL Encoder / Decoder

Percent-encode or decode URLs and params

HTML Entity Encoder / Decoder

Escape or unescape HTML entities safely

Number Base Converter

Binary, octal, decimal, hex and any base 2–36

Binary to Text Converter

Decode 0s and 1s into readable text

Hex to Text Converter

Decode hexadecimal into readable text

Hash Generator

SHA-256, SHA-1, SHA-512, MD5 & CRC32 checksums

JWT Decoder

Inspect JWT header, payload and expiry

Unix Timestamp Converter

Epoch to date and back, in your timezone

Roman Numeral Converter

Numbers to Roman numerals and back

Number to Words Converter

Spell out numbers in English words

JSON Formatter & Validator

Beautify, validate and minify JSON

JSON to YAML Converter

Two-way JSON and YAML conversion

JSON to CSV Converter

Flatten JSON arrays into CSV spreadsheets

CSV to JSON Converter

Spreadsheet rows to clean JSON objects

Formats in, formats out

Encodings are where copy-paste debugging lives: Base64 Encoder/Decoder handles full UTF-8 including emoji, the JWT Decoder exposes headers, payloads, and expiry without sending tokens anywhere, and the Hash Generator computes SHA-256, SHA-1, SHA-512, MD5, and CRC32 checksums for integrity checks. URL and HTML-entity codecs cover the everyday escaping chores.

For structured data, the JSON Formatter validates with exact error locations, JSON to YAML and JSON to CSV translate both directions, and the Number Base Converter spans bases 2–36 alongside dedicated binary, hex, timestamp, and Roman-numeral converters. Paste payloads freely — validation runs entirely in your tab.