ZIP Extractor Help

ZIP Extractor couldn't read your archive. The file may be corrupted, truncated, or in a format variant we don't support.

Common causes

• Corrupted archive. The file's internal structure is broken. This can happen if the file was modified, partially overwritten, or stored on failing media.
• Incomplete download. The file may not have finished downloading. If the download was interrupted by a network error, browser crash, or timeout, the resulting file will be truncated and unreadable.
• Unsupported format variant. Some archive formats have multiple versions or variants. For example, certain ZIP64 edge cases, self-extracting archives (.exe), or archives created with non-standard tools may use features that ZIP Extractor doesn't yet support.
• Wrong file type. The file may not actually be an archive. If a file has a .zip, .rar, .7z, or .tar extension but contains something else (for example, a renamed image or document), it can't be read as an archive. ZIP Extractor re-checks the file's contents: if a .zip is really a RAR or 7z, it reopens automatically, and if it isn't an archive at all, it names what it found, for example "This file appears to be a JPG file, not a ZIP archive."
• Encrypted archive header. Some RAR and 7z archives encrypt the file listing in addition to the file contents. If the header is encrypted, ZIP Extractor can't read the listing without the password.

What you can do

• Re-download the file. If you got the file from a shared link, email, or another online source, download it again. A fresh copy often resolves problems caused by incomplete transfers.
• Check the file size. If it's smaller than the source lists, the download was likely incomplete.
• Try opening the file with another tool. If a desktop app like 7-Zip, WinRAR, or The Unarchiver can open the file, it may use a format variant ZIP Extractor doesn't yet support. Extract the files with that tool instead.
• Ask the sender to re-create the archive. Have them create a new archive using standard ZIP compression (the Deflate method) and send it again.
• Add every part of a split archive. Split or spanned archives need all their parts. If you open a .zip, .z01, .001, or .partNN.rar volume, ZIP Extractor shows "Multi-part ZIP detected. Add remaining parts" with Add File Parts from Computer and Add File Parts from Drive buttons. Add every volume, up to 200 parts.

Technical details

The error details below the message include internal diagnostics (like a stack trace) that can help identify the specific failure. If you contact support, include these details or a screenshot. Or click Send Feedback on the error screen; it attaches these diagnostics for you.

The file you opened is zero bytes. An archive needs at least some structural data to be readable, so there's nothing here to open.

What you can do

• Download the file again. An incomplete or failed download is the most common cause of a zero-byte file. If you received it as an email attachment, try re-downloading the attachment.
• Check the file on your computer. Right-click the file and check its properties or "Get Info." If the size shows 0 bytes, the file itself is empty.
• Ask the sender to re-share the file. Their upload may have failed, leaving a zero-byte placeholder behind. Ask them to re-upload the original file.
• Check Google Drive for sync issues. If the file is on Google Drive, it may not have synced correctly from the sender's device. The file owner can verify the size in Drive and re-upload if needed.

Why does this happen?

A zero-byte file has a name but no content. It usually happens when a download is interrupted before any data transfers, or when a file sync fails silently and leaves a placeholder behind. Downloading the file again almost always resolves it.

Your browser ran out of memory while opening the archive. ZIP Extractor reads the archive into memory before showing you the file list, so it is limited by the memory the browser makes available to a single tab.

What you can do

• Close other tabs and apps. Each open tab uses memory. Closing ones you aren't using frees memory for ZIP Extractor.
• Try a different browser. Some browsers allocate more memory per tab than others. Chrome and Edge typically handle larger files well.
• Use a device with more RAM. If possible, try opening the file on a desktop or laptop with at least 8 GB of RAM.
• Split the archive. If you created the archive yourself, try splitting it into smaller parts (for example, under 1 to 2 GB each).

Why does this happen?

Browsers put memory limits on each tab to keep the overall system stable. Very large files (typically over 2 to 4 GB, depending on the device) can push past these limits.

A few things can prevent ZIP Extractor from downloading a file from Google Drive.

Check your internet connection

Make sure you're online and your connection is stable. Try loading another website to confirm. If you go offline mid-download, ZIP Extractor arms an automatic retry: reconnect and the download resumes on its own, up to twice per file. After that, use Retry.

Use the correct Google account

If the file belongs to a different Google account than the one you authorized, ZIP Extractor may not have permission to read it. Click Try Another Account and pick the account the file was shared with. Retry tries the same download with the same account again, so it won't help when the account is the problem.

Check that the file still exists

If the file was deleted, moved to trash, or the sharing link was revoked, it can no longer be downloaded. Ask the file owner to confirm it's still available. ZIP Extractor names the account it searched ("Couldn't find this file for..."). If that isn't the account the file was shared with, click "Try Another Account".

Disable browser extensions

Ad blockers, privacy extensions, and VPNs can interfere with Google Drive downloads. Try disabling extensions temporarily, or open ZIP Extractor in an Incognito/Private window.

On a school or work device?

Managed devices, such as school Chromebooks and company laptops, often run a network filter or security software that blocks file downloads from Google Drive even though the rest of the app loads normally. These filters usually can't be turned off by the user. Try a different network (for example, home Wi-Fi), or download the file from drive.google.com and open it in ZIP Extractor as a local file. If you need Drive downloads to work on that network, ask your administrator to allow downloads from www.googleapis.com.

Download keeps stopping partway

If the download starts but the connection drops before it finishes, your network link is likely unstable. This is most common on phones using cellular data or weak Wi-Fi. Click Retry, since a brief drop often clears on the next attempt. If it keeps failing, switch to a stronger or more stable network (for example, Wi-Fi instead of cellular data), or download the file from drive.google.com and open it in ZIP Extractor as a local file; the browser's own download manager can resume an interrupted download.

File may be too large for direct download

Very large files on Google Drive can time out during download. Try again; the second attempt often works. If the problem persists, download the file to your computer first, then open it in ZIP Extractor from there.

Google Drive has temporarily limited downloads of this file. Google enforces per-file download quotas to prevent excessive bandwidth usage. When too many people download the same file in a short time, further downloads are blocked until the quota resets.

What you can do

• Wait and try again later. The download quota resets automatically over time. Waiting a few hours (or up to 24 hours) usually resolves the issue.
• Download the file directly from Google Drive. Open the file in Google Drive, download it to your computer, then open it in ZIP Extractor from there.
• Ask the file owner for help. The owner can make a copy of the file in their Drive, which resets the quota. They can also share the file through a different method.
• Try another account. Click "Try Another Account"; an owner or editor account can sometimes get past the per-file cap.

Why does this happen?

Google Drive limits how frequently a single file can be downloaded across all users. Popular shared files are more likely to hit the quota, which is applied per file rather than per user account.

See also

• Google Drive API: Resolve errors

The owner of this file has turned off the option to download, print, or copy it. This is a Google Drive sharing setting. Until the owner changes it (or grants you Editor access), the file can't be downloaded by viewers or commenters.

What you can do

• Ask the owner to allow downloads. They can open the file's sharing settings in Google Drive and turn off "Disable options to download, print, and copy for commenters and viewers."
• Ask the owner for Editor access. Editors can always download a file regardless of the download-disabled setting.
• Sign in with a different Google account. If you have access to the same file through another account that has Editor permission, click "Try Another Account" and choose that account.

Why does this happen?

Google Drive lets file owners restrict downloads to limit how widely a file can be redistributed. When this setting is on, only Editors (and the owner) can download the file. ZIP Extractor needs to download the archive in order to read its contents, so the open fails with a "cannotDownloadFile" error.

See also

• Google Drive Help: Stop, limit, or change sharing
• Google Drive API: Resolve errors

Google Drive flagged this file as potentially malicious or spam, so it can't be downloaded by viewers. Google scans files on Drive and applies this restriction when its security systems identify the file as harmful or in violation of Drive's abuse policies. Until the file owner takes action, ZIP Extractor can't open it.

What you can do

• Ask the file owner to download and re-share. The owner can still download the file from their own Drive (Google shows them an "I understand the risk" prompt). They can verify it's safe and then send you a fresh copy by email or another transfer method.
• If you own the file, download it from Drive directly. Open the file in Google Drive and follow the prompt to acknowledge and download. If you believe the flag is wrong, you can request a review through Google's abuse appeal process.
• Get the original file from the source. If you have access to the original (for example, a project repository, vendor download page, or a backup), download from there instead.

Why does this happen?

Google Drive scans files for malware and spam. When a file is flagged, Google blocks downloads for everyone except the owner to prevent the file from spreading. The flag is not always right; legitimate files (especially executables, installers, and large compressed archives) are sometimes flagged by mistake. ZIP Extractor receives a "cannotDownloadAbusiveFile" error from the Drive API in this case and can't proceed.

See also

• Google: Abuse Program Policies & Enforcement
• Google Drive API: Manage downloads

This banner, "Cellular data connection detected", means you may be on a cellular data connection. Opening a ZIP file downloads the entire file to your browser before extraction can begin. On a limited data plan, that could use a noticeable chunk of your data allowance.

Why am I seeing this?

ZIP Extractor uses browser APIs to detect your connection type. This warning appears when a cellular or metered connection is detected and the file you're opening is 10 MB or larger. It doesn't show on desktop. Before any full download, ZIP Extractor fetches only a small tail of the file, so you can see the file listing and count first and decide from there.

What you can do

• Download Full ZIP. If you're on Wi-Fi or have an unlimited data plan, click "Download Full ZIP" to proceed normally.
• Wait for Wi-Fi. Close the file and reopen it once you're on Wi-Fi to avoid using cellular data.
• Check your connection. If you believe this warning is wrong (for example, you're on Wi-Fi but the browser reported otherwise), you can safely proceed by clicking "Download Full ZIP".

Technical details

This feature uses the Network Information API (navigator.connection), available in Chromium-based browsers (Chrome, Edge, Opera, Samsung Internet). It checks the type, effectiveType, and saveData properties. On browsers that don't expose this API (Safari, Firefox, and every browser on iOS), ZIP Extractor falls back to a simpler signal: on a phone, the warning appears for files of 100 MB or more. It never appears on a tablet or a desktop.

Your browser ran out of memory while extracting files, creating a new ZIP, encrypting, or otherwise editing this archive. These operations use more memory than just opening a ZIP, because the browser has to hold decompressed file contents or a fully-assembled output archive in memory.

While extracting files to your computer

When you extract to your computer, ZIP Extractor decompresses each file in memory before writing it to disk. If a file is large enough to exceed the browser's per-tab memory limit, the write fails.

• Extract fewer files at a time. Select a smaller batch instead of extracting everything at once. That keeps peak memory lower.
• Extract to Google Drive instead. Uploading to Drive uses less browser memory than writing to your local file system. Choose "Extract to Drive" instead of "Extract to Computer" (desktop Chrome or Edge).

While creating, encrypting, or saving a ZIP

Building a new ZIP, adding files, merging in another ZIP, converting from another format, encrypting, removing a password, repairing, or renaming entries all require the full archive to be assembled in memory before it can be downloaded or uploaded to Drive.

• Work with a smaller archive. Try splitting the source or removing entries you don't need.
• Save to Google Drive. Drive upload streams the archive without holding the entire file in memory at once.

What to do generally

• Close other tabs and apps. Each open tab uses memory. Closing ones you aren't using frees memory for ZIP Extractor.
• Try a different browser. Some browsers allocate more memory per tab than others. Chrome and Edge typically handle larger files well.
• Use a device with more RAM. If possible, try the same task on a desktop or laptop with at least 8 GB of RAM.

Why does this happen?

Browsers put memory limits on each tab to keep the overall system stable. When extracting or creating, ZIP Extractor has to hold significant amounts of decompressed or in-progress data in memory. Large files, or many files processed in a row, can push past the per-tab limit.

Your Google Drive storage quota is full. Files can't be uploaded to Drive until you free up space or upgrade your storage plan. Drive storage is shared across Drive, Gmail, and Google Photos, so deleting old emails or photos can also free up space.

What you can do

• Manage your storage. Click "Manage Storage in Drive" to open your Google Drive storage page, which shows what's using space.
• Delete files and empty the Trash. Deleted files still count against your quota until you empty the Trash. Open the Trash in Google Drive and click "Empty Trash."
• Check Gmail and Google Photos. Large email attachments and photos stored at original quality also count against Drive storage. Cleaning those up can reclaim space.
• Upgrade your storage plan. Visit Google One to purchase additional storage.
• Get the files without Drive. On desktop Chrome or Edge, use "Extract to Computer" to write the files into a folder you pick. On other desktop browsers, use "Download all files" from the More actions menu, which downloads up to 50 selected files into your Downloads folder.

ZIP Extractor couldn't save a file to your Google Drive. The file was decompressed successfully, but the upload didn't complete. This can happen when saving from either the preview or the file listing.

Common causes

• Network disconnected. Your internet connection dropped during the upload. Check that you're online, then try again.
• Google Drive storage full. Your Drive storage quota may be exceeded. Free up space or upgrade your plan, then try again.
• Authorization expired. Your Google authorization may have timed out. Click Retry, or click "Try Another Account" to re-authorize.
• File is read-only for your account. If the message says the file is read-only or mentions insufficient permissions, signing out won't help: you don't have permission to change the original file. See Saving a copy of a read-only file.
• Temporary server error. Google Drive may be experiencing a temporary outage. Wait a moment and try again.
• File too large. Very large files may time out before the upload completes. Try downloading the file instead and uploading it to Drive separately.
• Upload session error. The server occasionally fails to initialize the upload session. If the error message references a "Session URI," try again. This is a transient server-side issue.
• Rate limited or too many requests. Google Drive limits the number of requests per minute. Wait a moment and try again.

What you can do

• Check your internet connection.
• Click "Save to Drive" (in the preview) or "Save ZIP to Drive" (in the file listing) again to retry the upload.
• Download the file instead. Save it to your computer with the Download button, then upload it to Google Drive manually.

The file you opened is read-only for your account, so ZIP Extractor can't save a new version of it back to Google Drive. This happens when the file was shared with you as a viewer or commenter, or when the file's owner has locked its content against changes. Your edits are not lost; they just need a different destination.

What you can do

• Save a copy to My Drive. Click "Save copy to Drive" to save your edited archive as a new file in your own My Drive. After that, further saves update your copy.
• Download the file. Save the edited archive to your computer with the Download button.
• Ask the owner for Editor access. If you need to update the original file itself, ask its owner to share it with you as an Editor, or to remove the file's content lock.

Why does this happen?

Google Drive sharing roles control what you can do with a file. Viewers and commenters can open and read a file but can't change its content, and an owner can also lock a file so that even editors can't modify it. When ZIP Extractor tries to upload a new version of such a file, Google Drive refuses with an "insufficient permissions" error before any data is sent.

See also

• Google Drive Help: Stop, limit, or change sharing

ZIP Extractor can preview many common file types in the browser, but not every format is supported. When a file type can't be previewed, you'll see a "No preview available" message.

What you can do

• Download the file. Click Download to save the file to your computer, then open it with the right app.
• Try "Preview as Text." Some files (config files, log files, scripts) are plain text with an uncommon extension. Click Preview as Text to display the contents as text.
• Extract to Google Drive. Extract the file to your Drive and open it with a compatible Google Workspace app or a connected third-party app.

Previewable file types

ZIP Extractor can preview these types in the browser:

• Images: JPEG, PNG, GIF, WebP, AVIF, SVG, BMP, ICO, HEIC/HEIF, TIFF
• Text, data, and code: TXT and LOG; Markdown, HTML, CSV, JSON, XML, RTF, and LaTeX rendered as formatted documents, tables, and trees; CSS, JS, Python, Java, C/C++, and many more languages with syntax highlighting
• Documents: PDF
• Video: MP4, WebM, MOV, MKV, M4V, OGV
• Audio: MP3, M4A, AAC, WAV, FLAC, OGG, OPUS (with the built-in player)
• Viewable in Google Drive: Word, Excel, and PowerPoint files, OpenDocument and Apple iWork files, PSD, AI, EPS, DXF, RAW camera files, MOBI and AZW e-books, XPS, DjVu, and older video such as AVI and WMV. For these, ZIP Extractor shows "This file can be viewed in Google Drive" and a Preview in Drive button that saves the file to your Drive and opens Google's viewer
• E-books: EPUB (via E-Book Mode)
• Archives: ZIP, RAR, 7z, TAR, and the other supported formats, opened in place (nested archive browsing)

For anything else, download the file and open it with a dedicated app on your computer.

Your browser couldn't play an audio or video file from the archive. The file may use a format or codec your browser doesn't support.

What you can do

• Download the file and open it locally. A dedicated media player like VLC handles nearly every format. Save the file with the Download button, then open it in your preferred player.
• Try a different browser. Browser codec support varies. Chrome and Edge support the widest range of formats. Firefox and Safari may not play certain codecs (for example, AAC in some containers, or HEVC/H.265).
• Check if the file is corrupt. If the file was extracted from a damaged archive, it may be incomplete. Try re-downloading the original archive and extracting again.

Commonly supported formats

Most modern browsers support MP3, AAC, Ogg Vorbis, WAV, and FLAC for audio, and MP4 (H.264), WebM (VP8/VP9), and Ogg Theora for video. Formats like WMA, ALAC, AVI (non-H.264), and MKV may require a dedicated player.

Your browser couldn't display an image file from the archive. It didn't recognize the file as a supported image format.

What you can do

• Download and open it locally. Save the file with the Download button, then open it in an image viewer or editor on your computer. Desktop apps often support more formats than browsers do.
• Check the file extension. The file may have the wrong extension. For example, a file named photo.jpg might actually be a TIFF, BMP, or RAW file that the browser can't display. Try renaming it with the correct extension and opening it in a dedicated image viewer.
• Check if the file is corrupt. If the archive was damaged during download or transfer, individual files inside it may be incomplete or corrupted. Try re-downloading the original archive and extracting again.
• Try a different browser. Browser image format support varies slightly. Chrome and Edge generally support the widest range of formats.

Commonly supported image formats

Most modern browsers support JPEG, PNG, GIF, WebP, SVG, BMP, and ICO. Formats like TIFF, RAW (CR2, NEF, ARW), HEIC/HEIF (outside Safari), PSD, and AI typically require a dedicated image viewer or editor.

ZIP Extractor couldn't display this file as text. The file was extracted from the archive successfully, but the text couldn't be decoded or rendered in the preview.

Common causes

• Unsupported text encoding. The file may use a character encoding your browser doesn't support. ZIP Extractor tries to auto-detect the encoding, but some legacy or uncommon ones (such as certain older Cyrillic or East Asian codepages) may not be recognized.
• Binary file mistaken for text. If the file isn't actually a text file (for example, a renamed image, database, or compiled binary), displaying it as text will fail or show garbled content.
• Corrupted text data. The file contents may be damaged, resulting in byte sequences that can't be decoded as valid text in any encoding.

What you can do

• Try a different encoding. Use the Encoding button to pick a different character encoding. Common alternatives include Windows-1251 (Cyrillic), Shift_JIS (Japanese), Big5 (Chinese), and EUC-KR (Korean).
• Download the file. Save it to your computer and open it with a text editor that supports a wider range of encodings, like VS Code, Notepad++, or Sublime Text.
• Check the file type. Verify that the file is actually a text file. Files with extensions like .txt, .csv, .log, .xml, and .json are typically text. Other file types may not display correctly as text.

Technical details

ZIP Extractor uses the browser's built-in TextDecoder API to convert raw bytes into text. It supports the encodings defined in the WHATWG Encoding Standard. When auto-detection (powered by jschardet) returns an encoding name that falls outside this set, ZIP Extractor translates it to the closest supported encoding. If no suitable translation exists, the preview shows an error.

Large text files

Text previews stop at 1 MB. Past that, the preview ends with "PREVIEW TEXT WAS SHORTENED BY ZIP EXTRACTOR". Download the file to see the rest.

This EPUB file is protected by Digital Rights Management (DRM) and can't be rendered in ZIP Extractor's built-in reader. DRM-protected EPUBs encrypt their content so that only authorized reading applications can open them.

What you can do

• Open the EPUB in an authorized reader app. If you purchased this EPUB from an online bookstore such as Apple Books, Kobo, or Google Play Books, open it in that store's official reading app, which has the credentials to decrypt the content.
• Download the file. You can still extract the EPUB from the archive and download it to your device. Use the file listing to select the EPUB file, then click Download.
• Check if a DRM-free version is available. Some publishers offer DRM-free editions. Check the original source or contact the publisher.

Common DRM schemes

ZIP Extractor detects Adobe ADEPT, Apple FairPlay, Readium LCP, and a proprietary CKC scheme, and it also inspects encryption.xml to tell real content DRM from harmless font obfuscation. Font obfuscation (used by many DRM-free EPUBs to protect embedded fonts) is not treated as DRM and doesn't trigger this error.