File checksum checker
Calculate a file checksum locally and compare it with an expected value to check a download or a transferred file.
ZIP files and folders online
Create ZIP archives, browse their contents and extract selected files locally, with folder paths and integrity checks.
Add files or a folder to bundle into one ZIP.
ZIP only · 100 MiB input · 200 MiB extracted · 1,000 entries. Encrypted, multipart and ZIP64 archives are not supported.
About this tool
Bundle project handoff files or retrieve a few documents from an archive while keeping relative folder paths.
How to use
Add files or choose a folder to create one ZIP. Select the files to include and choose balanced compression, stronger compression or no compression. Already compressed photos and videos may shrink very little. Folder selection preserves relative paths; empty folders are not included.
To extract files, switch to Open a ZIP and choose an archive. Search the directory, select individual files, or download one file from its row. Downloading the selection as ZIP preserves its folder structure and uses no further compression. Search only filters the list; check the selected count before downloading. CRC checks run when files are extracted.
Only standard ZIP archives using stored or deflated entries are supported. Choose the original filename encoding for legacy ZIPs. Duplicate, unsafe or conflicting paths stop the operation rather than overwriting files. Encrypted, multipart, ZIP64, RAR and 7z archives are not supported.
Limits: 100 MiB input, 200 MiB of extracted data and 1,000 directory entries. Processing runs in a local Worker and can be cancelled; tasks stop after 60 seconds. No file is uploaded or saved by the site. Downloaded files keep their contents and are not scanned for malware.
Common questions
Which archive formats are supported?
Standard ZIP with stored or deflated entries. Encrypted, multipart and ZIP64 archives, RAR and 7z are unsupported. Limits are 100 MiB input, 200 MiB extracted data and 1,000 entries.
Does searching the file list change my selection?
No. Search changes which entries are shown; hidden selected files remain selected. To export only matches, clear the selection first and then select matching files.
How do I recover garbled filenames in an older ZIP?
Choose the encoding used when the archive was created, such as GB18030 or Shift_JIS, then inspect the names again. This fallback applies to legacy names; valid UTF-8 flags and verified Unicode name fields take precedence. It changes filename decoding, not the encoding of text inside the files.
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