# What is HTTPS?

HTTPS is the secure version of HTTP, encrypting the connection between your browser and a website with TLS so others on the network cannot read or alter it.

_Source: https://sharelargefilesfree.com/what-is-https · Updated 2026-10-13_

**Quick answer:** HTTPS is the secure version of HTTP, encrypting the connection between your browser and a website with TLS so others on the network cannot read or alter it.

## HTTPS (Hypertext Transfer Protocol Secure) explained

HTTPS is the encrypted version of HTTP, the system browsers use to load websites and transfer files. When a page loads over HTTPS, your browser checks the site's certificate and sets up an encrypted **TLS** connection. Anyone in between, such as someone on the same public Wi-Fi, sees only scrambled data.

HTTPS protects files _in transit_. It does not by itself protect them once they reach the server, which is the difference from end-to-end encryption.

Always check the address starts with https:// before uploading or downloading files. This site uses HTTPS for all uploads and downloads.

## What HTTPS protects, and what it does not

| Protected | Not protected |
| --- | --- |
| The contents of files you upload and download | Files once they are stored on the server |
| Passwords and forms you submit | The website's own trustworthiness: scam sites can use HTTPS too |
| The exact page addresses you visit on a site | The website name (domain) you connect to, and roughly how much data moves |
| Changes by someone in the middle of the connection | Malware already on your device |

## How to check a connection is secure

1. Look at the address bar: it should start with **https://** and show the site name you expect, spelled correctly.
2. Look for the browser's security icon to the left of the address. Click it to see that the connection is secure and who the certificate belongs to.
3. If the browser shows a full-page warning about the certificate, do not continue to upload or download files.

## Why HTTPS matters for big transfers

Large uploads often happen on shared connections: office networks, hotels, cafes. Without encryption, anyone on the same network could in principle capture the file as it passes. With HTTPS, they only see that you are connected to the site and an amount of data moving.

HTTPS also checks that each piece of data has not been altered on the way, so the file that arrives is the one you sent. For an extra layer, add a link password, or encrypt the file yourself before uploading.

## Frequently asked questions

### Does the padlock mean a site is safe?

It means the connection is encrypted and the certificate is valid. It does not prove the site itself is trustworthy.

### Is my file safe on public Wi-Fi?

Over HTTPS, others on the network cannot read the file in transit.

### Can my internet provider see the files I download over HTTPS?

They can see which website you connect to and roughly how much data you transfer, but not the contents of the files.

### What is TLS?

TLS (Transport Layer Security) is the encryption technology behind HTTPS. It replaced the older SSL, though people still often say SSL.