🔐 編碼轉換工具

🔤 ASCII 可讀性檢測ASCII Readability Detect ASCII 可讀性檢測器，估算文本中 ASCII 與可打印字符佔比，輔助判斷編碼與文本內容可讀性。ASCII Readability Detect - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Convers... 🔡 Base32 編碼長度Base32 Encode Length Base32 編碼長度計算器，求編碼後字符數並與 Base64 對比，用於數據編碼大小預估。Base32 Encode Length - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion ... 🔢 Base32 編碼長度估算Base32 Encode Length Estimate Base32 編碼長度估算器，按輸入字節數估算編碼後字符串長度，用於傳輸與存儲容量規劃。Base32 Encode Length Estimate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Co... 🔠 Base58 校驗長度Base58 Check Length 輸入原始字節長度，工具按 Base58 編碼規則併疊加 4 字節校驗和，估算編碼後字符串長度，常用於比特幣等加密貨幣地址長度預估。Base58 Check Length - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion t... 🔤 Base64 編碼 / 解碼Base64 Encode / Decode 支持普通 Base64 與 Base64Url 格式，正確處理 Unicode 文本。Encode and decode Base64 online, free and secure. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Co... 🗂️ Base64 編碼大小Base64 Encode Size 輸入原始文件或文本的字節大小，工具估算 Base64 編碼後的體積（約膨脹 1/3），並提示含換行時的額外開銷，便於評估嵌入成本。Base64 Encode Size - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion to... 📦 Base64 編碼長度Base64 Encode Length 輸入待編碼數據的字節數，工具按每 3 字節轉為 4 字符的規則估算 Base64 編碼後的字符數，便於判斷傳輸與存儲開銷。Base64 Encode Length - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion ... 🔤 二進制 / 十六進制轉 ASCIIBinary / Hex to ASCII 二進制 / 十六進制轉 ASCIIBinary / Hex to ASCII - Decode 8-bit binary or 2-digit hex groups back to readable text. Free, browser-only. ✅ CRC 校驗位寬CRC Checksum Width 輸入 CRC 標準名稱（如 CRC-8、CRC-16、CRC-32），工具給出對應的校驗位寬與十六進制表示長度，便於在通信或存儲中規劃校驗字段。CRC Checksum Width - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion to... 🛡️ CRC 檢錯能力估算CRC Error Detection Capability Estimate 輸入 CRC 校驗位寬（如 16 或 32）與信道隨機誤碼率，工具估算漏檢概率與附加開銷，幫助比較 CRC-16 與 CRC-32 的檢錯強度。CRC Error Detection Capability Estimate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encod... 🧱 HTML 實體長度HTML 輸入包含 &、<、>、" 等特殊字符的文本，工具估算轉義為 HTML 實體（如 &amp;）後的長度增量，便於預估網頁轉義後的體積變化。HTML - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion tools. 🔐 JWT 長度估算JWT Length Estimate 輸入 JWT 的 Header 與 Payload 長度，按 Base64 編碼約膨脹 33% 的規律估算令牌整體字節數，便於評估令牌體積與請求開銷。JWT Length Estimate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion t... 🔗 URL 編碼 / 解碼URL Encode / Decode 支持 URL 組件編碼（encodeURIComponent）與完整 URL 解析。Encode and decode URLs online, free and secure. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conv... 🌐 URL 編碼空間佔比URL 輸入原始 URL 或參數串，工具估算經百分號編碼後相比原文的體積增長比例，幫助你預判長參數在鏈接中的膨脹程度。URL - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion tools. 🔗 URL 編碼長度估算URL Encode Length Estimate 輸入可能含中文、空格或符號的 URL 字符串，工具按 RFC 3986 估算編碼後長度（僅字母數字及 -_.~ 安全），便於控制請求行長度。URL Encode Length Estimate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conve... 🔤 UTF-8 字節數UTF 8 輸入ASCII字符與多字節字符(如中文、emoji)的數量，按UTF-8變長編碼規則估算文本佔用的字節數，便於預估存儲與傳輸體積。UTF 8 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion tools. 🔲 二維碼版本容量Encode 5 輸入要編碼的字符數量與編碼模式（數字、字母或字節），工具估算所需的最低 QR 碼版本號與容量等級，便於生成合適尺寸的二維碼。Encode 5 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion tools. 📊 信息熵（香農）Entropy ( Shannon ) 信息熵（香農）計算器。輸入離散信源各符號概率，計算平均信息量 H（bit/符號），概率應和為 1、零概率項記 0，是數據壓縮與加密強度分析的基礎指標。Entropy ( Shannon ) - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion t... 🗝️ 凱撒密碼移位Encode 輸入英文字母與移位量（0–25），工具演示凱撒密碼下字母在字母表中的位置偏移結果，用於教學理解古典密碼的移位機制。Encode - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion tools. 🌲 哈夫曼平均碼長Huffman Average Code Length 輸入各符號的出現頻率或概率，工具按哈夫曼編碼估算平均碼長與壓縮效率，幫你評估數據在無損壓縮中的預期表現。Huffman Average Code Length - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conv... 🎲 哈希碰撞概率Hash Collision Probability 輸入哈希空間位數與已存入的條目數量，工具用生日攻擊模型估算發生碰撞的概率，提醒在 n 接近 √2^bits 時風險顯著上升。Hash Collision Probability - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conve... #️⃣ 哈希輸出長度Hash Output Length 哈希輸出長度速查計算器。列出常見哈希算法（MD5/SHA 系列等）的輸出長度，輸入算法即給出字節與位數，用於預估哈希值存儲空間與摘要長度選型。Hash Output Length - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion to... 📻 摩斯電碼時長Morse Code Duration 輸入英文單詞或字符序列，工具按摩斯電碼的點、劃與間隔時長換算總傳輸時間，幫助你理解報文在不同速率下的發送耗時。Morse Code Duration - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion t... 🗜️ 數據壓縮率Compression Ratio 數據壓縮率計算器。輸入原始大小與壓縮後大小，計算壓縮率與壓縮比，量化壓縮效果，壓縮率越接近 100% 表示壓縮越強，用於評估存儲與傳輸優化方案。Compression Ratio - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion tools. 🎯 校驗和碰撞概率Check and Collision Probability 校驗和碰撞概率估算器。輸入校驗和位數 n 與數據量，估算隨機錯誤下未被檢出的漏檢概率，説明其僅適用於隨機錯誤、不能防蓄意篡改，用於通信可靠性評估。Check and Collision Probability - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & ... 🧮 漢明碼校驗位Hamming Code Checksum Bits 漢明碼校驗位計算器。輸入數據位數，按 2^r ≥ m+r+1 計算糾正單比特錯誤所需的漢明校驗位數 r，用於差錯控制編碼設計與內存 ECC 教學。Hamming Code Checksum Bits - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conve... 🔍 漢明距離估算Hamming Distance Estimate 漢明距離估算器。輸入兩個等長二進制串，估算其差異比特數（漢明距離），差異率可用採樣統計近似，適用於編碼糾錯、數據傳輸可靠性與字符串相似度分析。Hamming Distance Estimate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conver... 📉 編碼冗餘度Coding Redundancy 編碼冗餘度計算器。比較平均碼長與信源信息熵，按 (平均碼長−熵)/熵 評估編碼冗餘度，冗餘越低編碼越優，適合通信系統編碼方案的效率分析與優化。Coding Redundancy - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion tools. 🔢 進制位數計算Radix Digits 輸入需要區分的狀態總數 N 與採用的進制，工具計算表示這些狀態所需的最少位數（如 256 種狀態在十六進制下需 2 位），用於編碼設計。Radix Digits - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion tools. 🔁 進制轉換位數Encode 6 輸入一個整數與目標進制（2 至 36），工具計算該數在目標進制下所需的位數，比較二進制、十六進制等表示同一數值的緊湊程度。Encode 6 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Encoding & Conversion tools.