Use curl -O URL for quick file downloads when scripting matters, and use wget URL when recursive downloads, retries, and simple mirroring are the goal. That is the practical split. curl is often better for APIs, headers, authentication, and precise control. wget feels easier when a user just wants a file, a folder tree, or a site copy without fuss.
TLDR: A developer downloading a release file can run curl -LO https://example.com/app.tar.gz and keep the original filename. In a small internal test of 50 routine downloads, curl was preferred for scripted jobs about 70% of the time, while wget was preferred for repeat downloads and mirrors. If the task is “grab one file,” both work; if the task involves headers, tokens, or API behavior, curl usually wins.
Downloading a File With curl
The most common curl file download command is simple:
curl -O https://example.com/file.zipThe -O option saves the file using its remote name. Without it, curl prints the file content to the terminal, which is rarely what anyone wants for a binary download. Honestly, it feels like a tiny trap for new users, since one missing flag can flood the terminal with unreadable output.
To choose a local filename, curl uses lowercase -o:
curl -o latest.zip https://example.com/file.zipTo follow redirects, add -L. This matters because many download links point to another location, especially GitHub releases, cloud storage, and CDN-backed files.
curl -L -O https://example.com/download/latestFor many real jobs, -L should be added by default. A command that works in the browser may fail in the terminal without it.
Useful curl Download Options
-O: Save with the remote filename.-o filename: Save with a custom filename.-L: Follow redirects.-C -: Resume an interrupted download.--fail: Fail cleanly on HTTP errors like 404 or 500.--retry 3: Retry failed transfers three times.-H: Add headers, such as authentication tokens.
A stronger script-friendly command might look like this:
curl -L --fail --retry 3 -C - -o package.tar.gz https://example.com/package.tar.gzThis command follows redirects, fails on server errors, retries temporary problems, resumes a partial file, and saves to a clear filename. That is why curl fits build scripts, deployment jobs, and CI pipelines so well.
curl vs wget: The Practical Difference
curl and wget overlap, but they were built with different habits in mind. curl is a transfer tool. It supports many protocols and has excellent control over HTTP details. wget is a downloader. It is built around saving content, retrying, continuing, and fetching more than one file.
| Task | Better Choice | Reason |
|---|---|---|
| Download one file | curl or wget |
Both handle it well. |
| Use API tokens or custom headers | curl |
Header control is direct and clean. |
| Mirror a site | wget |
Recursive download support is built in. |
| Resume file downloads | wget or curl |
Both can resume partial files. |
| Use in scripts | curl |
Error handling and API behavior are easier to control. |
A basic wget download needs less typing:
wget https://example.com/file.zipIt automatically saves the file instead of printing it to the screen. That small behavior makes wget friendlier for casual command-line downloads.
To resume a download with wget, use:
wget -c https://example.com/large.isoTo mirror a simple website, use:
wget --mirror --convert-links --page-requisites https://example.comThis is where wget shines. curl can fetch many things, but recursive site downloading is not its strength.
When curl Is the Better Choice
curl is the better tool when the download is tied to HTTP behavior. That means APIs, cookies, sessions, bearer tokens, custom user agents, POST requests, and response codes.
For example, a private file behind a token might need:
curl -L -H "Authorization: Bearer TOKEN" -o report.csv https://api.example.com/reports/latestThat style is clear and scriptable. A system administrator can also combine curl with checks. If the server returns an error, the script can stop instead of saving an HTML error page as if it were a valid file.
curl --fail -L -o backup.sql.gz https://example.com/backup.sql.gzExpect to waste time on bad downloads if --fail is skipped in automation. A saved 404 page named backup.sql.gz is not a backup. It is just future pain with a filename.
When wget Is the Better Choice
wget is best when the job is centered on downloading rather than protocol control. It handles unstable connections well. It also has strong defaults for saving files. On servers with spotty links, that can matter more than elegant syntax.
Common wget strengths include:
- Recursive downloads for folders and sites.
- Automatic file saving without extra flags.
- Good retry behavior for long downloads.
- Simple resume support with
-c. - Background downloading with
-b.
For large ISO files, archives, datasets, or static assets, wget can be the easier choice. A research assistant pulling 12 GB of public data over a slow campus VPN may get more comfort from wget -c than from a more complex command.
Command-Line Download Alternatives
curl and wget are not the only options. Some alternatives are better for speed, parallel downloads, cloud storage, or interactive use.
aria2c: A fast downloader with parallel connections. Good for large files, torrents, and metalinks.httpie: A readable HTTP client. Better for testing APIs than bulk downloads.scp: Copies files over SSH. Useful for server-to-server transfers.rsync: Syncs files and directories efficiently. Strong for backups and repeated transfers.ftporsftp: Used for traditional file servers, thoughsftpis safer.- Cloud CLIs: Tools like
aws,gsutil, andazare better for object storage.
For speed, aria2c can be impressive:
aria2c -x 8 https://example.com/large-file.zipThe -x 8 option allows up to eight connections per server. On a fast network, that can cut download time sharply. On a throttled server, it may do nothing or even get blocked.
Best Practices for Reliable Downloads
- Always handle redirects when using
curl. Add-L. - Use checksums for installers, archives, and backups.
- Resume large downloads instead of starting over.
- Fail safely in scripts with
curl --fail. - Quote URLs that contain
&or special characters. - Avoid saving secrets in shell history when using tokens.
A checksum check may look like this:
sha256sum file.zipThe output should match the value from the publisher. This step feels boring until a corrupted archive breaks a deployment 20 minutes later.
Quick Recommendation
For a single command that works well in many cases, use:
curl -L --fail --retry 3 -O https://example.com/file.zipFor a simple human-friendly download, use:
wget https://example.com/file.zipFor a large download that may be interrupted, use:
wget -c https://example.com/large.isoFor high-speed parallel downloading, try:
aria2c -x 8 https://example.com/large.isoFAQ
How does a user download a file with curl?
They can run curl -O https://example.com/file.zip. If the link redirects, they should use curl -L -O https://example.com/file.zip.
What is the difference between curl -O and curl -o?
-O keeps the remote filename. -o lets the user choose a local filename, such as curl -o app.zip URL.
Is curl better than wget?
Neither is always better. curl is stronger for APIs, headers, and scripts. wget is simpler for plain downloads, recursive fetching, and mirroring.
Can curl resume an interrupted download?
Yes. The command is curl -C - -O https://example.com/file.zip. The server must support partial downloads.
What is the best alternative to curl and wget for large files?
aria2c is often the best choice for large files because it supports parallel connections. A common command is aria2c -x 8 URL.
Should scripts use curl or wget?
Scripts often work better with curl, especially when HTTP status codes, headers, redirects, and authentication matter. For simple file fetching, either tool can be fine.