Encoding

These tools move text and files between representations. They handle Base64 encoding and decoding (including files and data URIs), automatic repair of garbled text across UTF-8, Shift_JIS, and EUC-JP, ASCII and Unicode character tables, removing line breaks or wrapping at a set width, HTML escaping, file extension to MIME type mapping, and character counting for social media posts.

Base64 Encode / Decode — Free, No Sign-up

Free tool to encode text to Base64 or decode it back, switching modes in one click. Useful for email attachments and JWT tokens. Runs in your browser — nothing sent to a server.

ASCII Code Table (Free) — Character to Code Converter

Free, complete ASCII code table (0–127) with an instant character-to-code converter. Look up decimal, hex, octal, and binary values, plus control character descriptions — a handy developer reference.

Line break at a specified length

Insert a line break at a specified length.

HTML Escape / Unescape

Convert special characters like &, <, >, ", and ' into HTML entities (escape), or convert entities back to their original characters (unescape). Useful for XSS prevention and embedding text in HTML.

Mojibake Converter & Fixer — Character Encoding Repair Tool

Paste garbled (mojibake) text to instantly detect the encoding mismatch that caused it, with ranked repair candidates. Also converts explicitly between UTF-8, Shift_JIS, EUC-JP, and JIS (ISO-2022-JP) — free, no sign-up r...

Remove Line Breaks Tool

Remove, replace, or clean up line breaks in text in bulk. Useful for fixing text copied from PDFs or Excel where breaks appear mid-word, or for preparing text for CSV cells and single-line logs. It can also convert line...

SNS Character Counter (Twitter/X-style Count)

A character counter that follows X (formerly Twitter)'s weighted counting rule. Full-width characters count as 2, half-width characters count as 1, and the tool shows how many characters remain before the 280-character l...

Extension ↔ MIME Type Converter

Look up and convert between file extensions and MIME types (Content-Type) in either direction. Type ".png" or "png" to see its MIME type, or "image/png" to see its matching extensions. Includes a reference table of about...

Unicode / Character Code Cross-Reference

Free tool that shows a character's Unicode code point, UTF-8 byte sequence, and JavaScript/HTML/URL/CSS escape representations side by side. Everything runs in your browser.

File to Base64 Converter (with data URI support, both directions)

Convert any file (image, PDF, and more) to a Base64 string or data URI, or decode a Base64 string / data URI back into a downloadable file. Everything runs in your browser — files are never sent to a server.