Check the given RG link:

https://www.researchgate.net/post/Are_there_any_free_online_English_editing_services/1

Please have a look at these researchgate links also.

https://www.researchgate.net/post/Can_you_suggest_any_free_online_English_Language_Editing_service_for_manuscript

https://www.researchgate.net/post/Advanced_English_language_editing_software_for_scientific_paper_writing

https://www.researchgate.net/post/Can_someone_suggest_some_professional_article_editing_services/1

https://www.researchgate.net/post/Could_you_please_recommend_me_a_good_English_Editing_Service_to_revise_microbiology_molecular_biology_papers

Sure..try here..Best.

https://www.paperrater.com/

https://prowritingaid.com/

Thanks a lot dear Surender Singh..

Thanks dear  Arvind Singh 

Thank you dear Subir Bandyopadhyay ·

Dear Soheila:

Check also here:

https://chrome.google.com/webstore/detail/grammarly-for-chrome/kbfnbcaeplbcioakkpcpgfkobkghlhen

Thanks Dear Maria Dolores Castrillo

Dear Soheila,

I have started a crowdfunding project that will allow me to provide free or discounted editing services for researchers from some countries. To check if you are eligible and register your interest please fill out the form on this page: https://www.scienceeditorium.com/crowdunding-campaign/

If you would like to support our campaign you can visit the funding page https://igg.me/at/scienceeditorium/x/16702788 or share it with your network of researchers.

Kind regards,

Zoran

I would highly recommend Manuscript lab (www.manuscriptlab.com). Although they do charge, the costs are nominal; however, their copyedited work, at least in my case, was accepted in a very good journal. They support me till publication of my work. Also, they have language as well subject editors for the tasks. They are the best option in the market.

So please are these service give us certificate of editing?