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Step 1.)
Go To This Link { Click Here }
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Step 2.)
Then Click On Choose File Button.
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Step 3.)
Then Select An Image Which You Want To Insert In Chat Window :)
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Step 4.)
Then You've To Click On Upload Now.
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Step 5.)
After That, It'll Take Some Time & Then It Will Redirect You To Another Page With Some Code.
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Step 6.)
Copy That Code & Paste It Into Chat Window & Then Hit Enter.
Your Desired Image Will Be Displayed :DThank You.