Multi-Hash File Calculator
Calculate SHA-1, SHA-256, SHA-384, and SHA-512 checksums
Multi-Hash File Calculator — what it does
Calculate SHA-1, SHA-256, SHA-384 and SHA-512 checksums for one or more files in a single pass, and export the results as CSV. Publishers list different algorithms, so having all four at once removes the guesswork about which one the verification page expects.
When this tool helps
- Verifying downloads against whichever checksum a vendor happened to publish.
- Recording fingerprints for a set of files before archiving or transferring them.
- Producing a checksum manifest to accompany a delivery of files.
How to use it
- Choose the files to hash.
- Calculate the hashes.
- Compare against the published values.
- Download the CSV manifest for your records.
Accuracy, limits, and good practice
- SHA-256 is the sensible default. SHA-1 is included only because older projects still publish it, not because it is trustworthy against tampering.
- Compare the full string. Matching the first six characters proves nothing about the rest of the digest.
- Hashing reads every byte, so a large batch takes real time — the wait is proportional to total size, not file count.
- Hashing runs one file after another, so a slow-looking batch is usually one very large file rather than a stalled tool.
Frequently asked questions
Which algorithm should I trust?
SHA-256 or stronger. SHA-1 has demonstrated collisions and should not be relied on to detect deliberate tampering.
Why do publishers list several?
Compatibility with different verification tools and habits. Any one match against a genuinely published value is sufficient.
Is anything uploaded?
No. The Web Crypto API computes every digest locally in your browser.
Why does the same file give four different values?
Each algorithm produces a different digest length and construction. Compare like with like: a SHA-256 value never matches a SHA-512 value for the same file.
Related tools on this site
- Weekly Planner Generator — Create and print a seven-day weekly planning sheet
- File Base64 Encoder & Decoder — Convert any file to Base64 or restore Base64 data into a downloadable file
- Meeting Agenda Builder — Turn meeting topics into a timed agenda and export it
Everything above runs inside this page. Multi-Hash File Calculator needs no account, no upload, and no server round trip — close the tab and nothing is left behind.
多演算法檔案雜湊能做什麼
一次為一個或多個檔案計算 SHA-1、SHA-256、SHA-384 與 SHA-512 校驗值，並可匯出成 CSV。各家發佈的演算法不同，四種一次到齊，就不必猜驗證頁面要的是哪一個。
什麼時候用得上
- 以官方碰巧公布的那種校驗值來驗證下載檔。
- 在封存或傳輸前，為一組檔案記錄指紋。
- 產出隨檔案交付的校驗值清單。
使用步驟
- 選擇要計算雜湊的檔案。
- 執行計算。
- 與公布的數值比對。
- 下載 CSV 清單存檔備查。
精確度、限制與實務建議
- SHA-256 是合理預設。列出 SHA-1 只是因為舊專案仍在公布它，並不代表它足以對抗竄改。
- 請比對完整字串。前六碼相同，證明不了摘要其餘部分。
- 雜湊要讀完每個位元組，大批檔案需要實際時間——等待長度取決於總容量而非檔案數。
- 雜湊是逐檔進行的，看起來卡住的批次通常只是其中有一個超大檔案，而不是工具當掉。
常見問題
該相信哪一種演算法？
SHA-256 或更強者。SHA-1 已被證實可製造碰撞，不應用來偵測刻意竄改。
為什麼官方會列出好幾種？
為了相容不同驗證工具與使用習慣。只要有一種與正式公布值相符即已足夠。
會上傳任何東西嗎？
不會。所有摘要都由 Web Crypto API 在你的瀏覽器本機計算。
同一個檔案為什麼有四個不同的值？
每種演算法的摘要長度與結構都不同。請同類比同類：同一個檔案的 SHA-256 永遠不會等於 SHA-512。
本站相關工具
- 每週計畫表生成器 — 建立並列印七天的每週規劃表
- 檔案 Base64 編解碼 — 將任意檔案轉為 Base64，或將 Base64 還原成可下載檔案
- 會議議程產生器 — 將會議主題製作成分配時間的議程並匯出
以上步驟全部在這個頁面內完成，多演算法檔案雜湊 不需要註冊、不上傳檔案、也不經過伺服器，關閉分頁後不會留下任何資料。