> For the complete documentation index, see [llms.txt](https://guide.highway.gov.sg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.highway.gov.sg/for-citizens/public-faqs/general.md).

# General

## Is Highway secure? How can I tell if it is a legitimate Highway link? 

A legitimate Highway link willl always have:

* a **gov.sg** domain, and 
* a **"Singapore Government Agency Website" banner** to ensure legitimacy

<figure><img src="/files/jXhSQunXvEtpzl5m3wSD" alt=""><figcaption></figcaption></figure>

## What file types are allowed?

We currently support uploading of these following file types below.

Documents: ‘doc’, ‘docx’, ‘ppt’, ‘pptx’, ‘xls’, ‘xlsx’, ‘csv’, ‘pdf’, ‘rtf’

Images: ‘bmp’, ‘png’, ‘gif’, ‘jpeg’, ‘jpg’, ‘svg’, ‘tif’, ‘tiff’

Videos: ‘mpeg’, ‘mpg’, ‘wmv’, ‘avi’, ‘mp4’

Audio: ‘m4a’, ‘mp3’, ‘wav’

Others: 'asc', 'cer', 'csv', 'dot', 'dxf', 'ent', 'htm', 'html', 'log', 'mpp', 'msg', 'mso', 'odb', 'odf', 'odg', 'odp', 'ods', 'odt', 'p7m', 'gno', 'p7s', 'pcx', 'pot', 'pps', 'ppsx', 'psd', 'pub', 'rtf', 'sxc', 'sxd', 'sxi', 'sxw', 'tar', 'txt', 'vcf', 'vsd', 'xml', 'zip', '264', 'edr', 'jdr', 'ts'

## Can I submit files multiple times via the same link?

Yes, this is possible. Do note however that the submission link has an expiry date. If your submission link has expired, please contact the agency officer that created the link to recreate it for you to submit files.

## What are the file size limits?

File size limit is up to 1 GB per file.

## I can't find an answer to my question. Where can I get further assistance?

Please contact our team through this form: <https://go.gov.sg/highway-support>