Hash & checksum · SHA-1

SHA-1 hash generator

Calculate a SHA-1 value from your input, on this device.

Ready◎ This file never leaves your device⌁ text/plain · */*

Processing locallyThis file never leaves your device

Working with several files? Add the files you need, then keep this tab open until processing finishes. Large batches use more device memory.

Drag and drop files here

Supported files: text/plain, */*

1Choose your file→2Set the result→3Convert and download

Local workflow

How it works

Choose your file

Pick a supported file from your device or drop it into the tool.

Set the result

Choose the output, quality, or size options that matter for this job.

Convert and download

Your browser processes the file locally and prepares a fresh download.

Before you start

The file picker accepts: text/plain, */*. The contents and encoding of the file must also be supported; an extension alone does not guarantee compatibility.

What to expect

Compare the result with a reference made using the same algorithm and the same input. A changed byte or line ending changes the digest. A matching checksum does not, by itself, establish who created a file.

SHA-1 is retained for compatibility. It is collision-prone and should not be selected for a new security-sensitive design.

Limits to keep in mind

SHA-1 is collision-prone and is retained only for compatibility.

Help

Frequently asked questions

Is the file uploaded?＋

File contents are processed on your device. The browser downloads the tools it needs, but does not upload your file to LocalConvert for conversion.

What if processing does not finish?＋

Read the error shown by the tool. An unsupported format needs a different input; running out of memory may require a smaller file or a more capable device. Keep the tab open while the job runs.