Can one extend a Thai 30-day visa-free stamp any time before the stamp's expiration or can one extend it only when close to the expiration?

I read on https://www.dontworryjusttravel.com/asiapacific/thailand/thailand-60-day-tourist-visa/#How_to_extend_your_stay_for_30_more_days_without_getting_a_Thailand_tourist_visa:

Can I extend my tourist visa in Thailand? If you entered Thailand and received a 30 day stamp in your passport (this is called a 30 day visa exemption) – you can also extend a 60 day tourist visa by 30 days to a total of 90 days for the same fee – you can extend this stamp a further 30 days at any Thailand immigration centre for a fee of 1900 Baht.

Can one extend one's 30-day visa-free stamp any time before the stamp's expiration one wants or can one extend it only when close to the expiration? For example, can one extend the 30-day visa-free stamp just the day after getting the stamp when entering Thailand?

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Can one extend a Thai 30-day visa-free stamp any time before the stamp's expiration or can one extend it only when close to the expiration? - Watch With Straps Beside Smartphone on Table

Can one extend a Thai 30-day visa-free stamp any time before the stamp's expiration or can one extend it only when close to the expiration? - From above of crop anonymous male opening can of drink standing on sandy beach

Can one extend a Thai 30-day visa-free stamp any time before the stamp's expiration or can one extend it only when close to the expiration? - High angle of male pouring carbonated drink from tin can to smiling black friend sitting with red cup

Can a Thai visa exemption be extended?

You are able to extend this 30-day visa exemption stamp for another 30 days at the local Thai immigration office. For the extension, you just have to submit one passport-size photo (4cm x 6cm) with white background, TM6 card, TM30 receipt from your hotel, and pay the fee of 1,900 Thai baht.

Can 30-day visa extend Thailand?

Each entry of 60 days can be extended for an additional 30 days. Visa extensions on a Thai Tourist Visa are usually very straight forward. You will simply need to go to a Thai Immigration Office and fill in a TM. 7 visa extension form, and pay the fee of 1900 Thai baht.

How many times can I extend my visa exemption in Thailand?

Those who arrive at the airport without a prior visa will continue to receive a 30-day stamp up to 6 times per calendar year. Extensions at Thai Immigration for the visa exemption stamps remain to be 30 days for a fee of 1,900 baht.

Can I renew my visa before it expires?

You do not have to wait until your current visa expires. You can apply for a new visa even if your current visa is valid.

HOW TO GET A 30 DAY VISA EXTENSION IN THAILAND

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