File Chunk Merger
Merge numbered file chunks back into one file
File Chunk Merger — what it does
Select the numbered chunks produced by a file splitter and merge them back into the original single file, restoring it byte for byte. Order is what matters: chunks are joined in sequence, so as long as every numbered part is present, the reconstruction is exact.
When this tool helps
- Reassembling a large file that was split to fit email attachment limits.
- Restoring a backup that was chunked for storage on size-limited media.
- Completing a transfer where a colleague sent a file in numbered parts.
How to use it
- Select all the chunk files.
- Set the output filename, including its extension.
- Merge the chunks.
- Download and verify the reconstructed file.
Accuracy, limits, and good practice
- Every chunk must be present — a missing middle part produces a file that is silently corrupt rather than visibly incomplete.
- Give the output its original extension; the merged bytes are correct either way, but the extension tells the OS how to open it.
- Verify the result against the original's SHA-256 checksum with the file hash tool whenever the source published one.
- Merge into a folder with plenty of free space: the reconstructed file exists alongside the chunks until you delete them.
Frequently asked questions
Does chunk selection order matter?
Chunks are ordered by their numbering, which is why the splitter's zero-padded names are important to keep intact.
Can I merge chunks from other splitting tools?
If they are plain sequential binary segments, yes. Chunks produced with headers or compression by other software will not reconstruct correctly.
How do I know the merge succeeded?
Compare file size with the original, or better, compare checksums — identical SHA-256 values prove byte-exact reconstruction.
Can I merge chunks received from different people?
Yes, provided they came from one original split and every numbered part is present and unmodified.
Related tools on this site
- Monthly Calendar Generator — Create and print a clean monthly office calendar
- Text File Merger — Combine multiple text files in order with a custom separator
- Directory Tree Generator — Select a folder and generate a downloadable text directory tree
Everything above runs inside this page. File Chunk Merger needs no account, no upload, and no server round trip — close the tab and nothing is left behind.
檔案分塊合併工具能做什麼
選取由檔案分塊工具產生的編號分塊，合併回原始的單一檔案，逐位元組還原。順序是關鍵：分塊會按編號依序接合，只要每個編號的部分都在，重建就是精確的。
什麼時候用得上
- 重組為配合郵件附件上限而切開的大檔案。
- 還原為了存放在容量受限媒體上而分塊的備份。
- 完成同事以編號分批傳來的檔案。
使用步驟
- 選取所有分塊檔案。
- 設定輸出檔名（含副檔名）。
- 執行合併。
- 下載並驗證還原後的檔案。
精確度、限制與實務建議
- 每個分塊都必須到齊——缺了中間一塊，產出的是悄悄損壞的檔案，而不是看得出來的不完整。
- 輸出請用原本的副檔名；位元組內容無論如何都正確，但副檔名決定系統用什麼開啟。
- 來源若公布過 SHA-256 校驗值，請用檔案雜湊工具核對合併結果。
- 請在剩餘空間充足的資料夾中合併：在你刪掉分塊之前，還原後的檔案會與分塊同時存在。
常見問題
選取分塊的順序重要嗎？
分塊按編號排序接合，這也是分塊工具補零命名必須保持完整的原因。
其他工具切的分塊也能合併嗎？
如果是單純的循序二進位片段就可以；其他軟體帶標頭或壓縮的分塊無法正確重建。
怎麼確認合併成功？
比對檔案大小，更好的是比對校驗值——SHA-256 相同即證明逐位元組還原無誤。
可以合併不同人傳來的分塊嗎？
可以，前提是它們來自同一次切割，且每個編號的部分都齊全且未被修改。
本站相關工具
以上步驟全部在這個頁面內完成，檔案分塊合併工具 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。