Free Online Encoder & Decoder Tools
Encode and decode data online: Base64, URL encoding, HTML entities, hashing (MD5, SHA-256), JWT, and more.
57 tools available
Base64エンコーダー/デコーダー
テキストをBase64にエンコード、Base64をデコード
URLエンコーダー/デコーダー
URLコンポーネントとクエリパラメータのエンコード/デコード
ハッシュジェネレーター
テキストからMD5、SHA-1、SHA-256、SHA-512ハッシュを生成
マルチハッシュジェネレーター
テキストやファイルからMD5、SHA-1、SHA-256、SHA-384、SHA-512ハッシュを同時生成
JWTデコーダー
JSON Web Tokenをデコードしてヘッダー、ペイロード、署名を確認
HTMLエンティティエンコーダー
HTMLエンティティと特殊文字のエンコード/デコード
画像Base64変換
画像をBase64文字列とdata URIに変換。ドラッグ＆ドロップ対応
Escape / Unescape
HTML、JavaScript、JSONのエスケープ/アンエスケープ
PEM / 証明書デコーダー
PEM証明書をデコード
Bcrypt Hash生成
コスト可変のbcryptハッシュを生成
ASCII Text Converter
Convert between ASCII codes and text characters with reference table
Md5 Hash Generator
Md5 Hash Generator - Free online tool for Hash generation (MD5, SHA). Fast, secure, and easy to use.
Sha256 Hash Generator
Sha256 Hash Generator - Free online tool for Hash generation (MD5, SHA). Fast, secure, and easy to use.
Sha1 Hash Generator
Sha1 Hash Generator - Free online tool for Hash generation (MD5, SHA). Fast, secure, and easy to use.
Sha512 Hash Generator
Sha512 Hash Generator - Free online tool for Hash generation (MD5, SHA). Fast, secure, and easy to use.
Base64 Encoder
Encode text to Base64 format
Base64 Decoder
Fast Base64 decoder for text and binary data
String To Base64
String To Base64 - Free online tool for Base64 encoding and decoding. Fast, secure, and easy to use.
Jwt Token Decoder
Jwt Token Decoder - Free online tool for JWT token decoding. Fast, secure, and easy to use.
Jwt Parser
Jwt Parser - Free online tool for JWT token decoding. Fast, secure, and easy to use.
Jwt Validator
Jwt Validator - Free online tool for JWT token decoding. Fast, secure, and easy to use.
Url Decoder
Url Decoder - Free online tool for URL encoding/decoding. Fast, secure, and easy to use.
Url Encode
Url Encode - Free online tool for URL encoding/decoding. Fast, secure, and easy to use.
Percent Encoding Tool
Percent Encoding Tool - Free online tool for data processing. Fast, secure, and easy to use.
Md5 Vs Sha256
Md5 Vs Sha256 - Free online tool for MD5 hashing. Fast, secure, and easy to use.
Base64 vs URL Encoding
Compare Base64 and URL encoding with side-by-side examples
Jwt Vs Session
Jwt Vs Session - Free online tool for JWT token decoding. Fast, secure, and easy to use.
Base64 画像変換ツール
画像を Base64 文字列に変換、または Base64 を画像に変換
JWT デコーダーオンライン
JWTトークンを無料でオンラインデコード
HTMLエンティティ エンコーダー/デコーダー
名前付きおよび数値エンティティのサポートでHTMLエンティティをエンコード/デコード
画像からBase64エンコーダー
画像をBase64文字列とData URIに変換、ドラッグ&ドロップ対応
Online Hash Generator
Online Hash Generator - Free online tool for Hash generation (MD5, SHA). Fast, secure, and easy to use.
Base64 Decoder Online
Free online Base64 decoder with instant results
Base64 to Image
Convert Base64 image strings to viewable and downloadable images
Text To Binary
Text To Binary - Free online tool for Text processing. Fast, secure, and easy to use.
Base64 Encode Online
Free online Base64 encoder for text and files
Url Shortener Tool
Url Shortener Tool - Free online tool for URL encoding/decoding. Fast, secure, and easy to use.
Base64 Image Decoder
Convert Base64 image data back to image files
Jwt Debugger
Jwt Debugger - Free online tool for JWT token decoding. Fast, secure, and easy to use.
String Hash Generator
String Hash Generator - Free online tool for Hash generation (MD5, SHA). Fast, secure, and easy to use.
JWT Generator
Generate JWT tokens
Base64 Decode
Decode Base64 encoded text back to plain text
Base64 Encoder/Decoder
Encode and decode Base64 in one tool with bidirectional conversion
Url Encode Decode
Url Encode Decode - Free online tool for URL encoding/decoding. Fast, secure, and easy to use.
Base64 Image Encoder
Convert images to Base64 and Base64 to images
Html Encoder
Html Encoder - Free online tool for HTML processing. Fast, secure, and easy to use.
Sha256 Hash
Sha256 Hash - Free online tool for Hash generation (MD5, SHA). Fast, secure, and easy to use.
Url Encoder
Url Encoder - Free online tool for URL encoding/decoding. Fast, secure, and easy to use.
SAMLデコーダー
SAMLレスポンスとリクエストのデコードと検査
Protobufデコーダー
Protocol Buffersバイナリデータのデコード
Certutil Base64 Decoder
Decode certutil Base64 encoded strings and certificates online. Convert Base64 from environment variables, certificates, and command-line output.
Base32 Encoder/Decoder
Encode/decode Base32 strings
Binary to Text
Convert between binary and text
Text to Morse Code
Convert text to Morse code and back
Base58 Encoder/Decoder
Encode and decode Base58 strings
SVG to CSS Converter
Convert SVG to CSS background-image data URI
HTML Entity Decoder
Encode/decode HTML entities
About Free Online Encoder & Decoder Tools
DevToolBox provides a collection of free online developer tools to help you efficiently complete everyday development tasks. This category includes 57 tools, all running directly in your browser with no installation required. Your data stays on your device and is never sent to our servers, ensuring complete privacy.
All tools are completely free with no registration or login required. Available in 15 languages for developers worldwide.