ShareX image uploader.
Screenshot, link, done.

1. Download the uploader

Pick the link you want ShareX to copy after each screenshot:

• BasePic.sxcu — the short link, such as https://basepic.com/vqSvesFU: a page with the image that shows a preview in chats.
• BasePic-direct.sxcu — the direct link to the image file, such as https://basepic.com/vqSvesFU/screenshot.png: for forums, Markdown and <img>.

2. Add it to ShareX

Double-click the downloaded file. ShareX adds BasePic to its custom uploaders and asks whether to set it as the active custom uploader for images — choose Yes.

Or add it by hand: in the ShareX main window click Custom uploader settings…, then Import → From file… and pick the file. Then choose Destinations → Image uploaders → Custom image uploader.

3. Turn on uploading

A new ShareX install saves each screenshot and copies the image, but does not upload it. In the main window open After capture tasks and tick Upload image to host. After upload tasks → Copy URL to clipboard is already on.

4. Take a screenshot

ShareX uploads it to BasePic and copies the link to the clipboard, so you can paste it right away. Every upload is also listed under History… in the main window.

Delete a screenshot

ShareX keeps a deletion link for every upload. Open History…, right-click the screenshot and choose Open → Deletion URL. The BasePic page of the image opens in your browser with a Delete button. Deleting removes both links.

What the file contains

The uploader is a small text file. It sends the screenshot itself to the BasePic API and reads the link from the answer:

{
    "Version": "21.0.0",
    "Name": "BasePic",
    "DestinationType": "ImageUploader",
    "RequestMethod": "POST",
    "RequestURL": "https://basepic.com/api/v1/images",
    "Parameters": {
        "filename": "{filename}"
    },
    "Body": "Binary",
    "URL": "{json:page_url}",
    "ThumbnailURL": "{json:image_url}",
    "DeletionURL": "{json:page_url}#delete={json:delete_key}",
    "ErrorMessage": "{json:error}"
}

The direct-link file is the same, with "URL": "{json:image_url}". The API is described on API for AI.

Greenshot (Windows)

Greenshot’s External command plugin can send a screenshot to BasePic with curl.exe, which comes with Windows 10 (version 1803 and later) and Windows 11. Right-click the Greenshot icon, choose Configure external commands, then New:

• Name: BasePic
• Command: C:\Windows\System32\curl.exe
• Arguments: the line below

-s -H "Content-Type: image/png" --data-binary "@{0}" "https://basepic.com/api/v1/images?filename=screenshot.png"

After a capture, pick BasePic in the menu Greenshot shows. Greenshot copies the first link from the answer — the short link — to the clipboard.

Without ShareX

Any program that can run a command can upload the same way. The answer is JSON; page_url is the short link and image_url the direct one.

Linux and macOS, with Flameshot:

flameshot gui --raw | curl -s -H 'Content-Type: image/png' --data-binary @- \
  'https://basepic.com/api/v1/images?filename=screenshot.png'

macOS, with the built-in screenshot tool (select an area, then the link is copied):

screencapture -i /tmp/shot.png && curl -s -H 'Content-Type: image/png' \
  --data-binary @/tmp/shot.png 'https://basepic.com/api/v1/images?filename=shot.png' \
  | sed -E 's/.*"page_url":"([^"]+)".*/\1/' | pbcopy

Any system, a file you already have:

curl -s -H 'Content-Type: image/png' --data-binary @screenshot.png \
  'https://basepic.com/api/v1/images?filename=screenshot.png'

Limits and rules

• Free, no sign-up and no key. Per IP address: 60 uploads per hour, 300 per day and 2 GB per day. Images up to 50 MB.
• Images only: PNG, JPG, GIF, WebP, BMP (saved as PNG), TIFF, HEIC and AVIF. Videos and other files: upload them on the home page.
• Uploads are private: not listed anywhere and hidden from search engines. Only people with a link can see them.
• Upload only images you have the right to share.