Online free essay editing services include automated tools like PaperRater and Grammarly, and professional editing sites such as HGPublishing offer free editing for 500 words. Proofreading.com also offers a free 300 word sample edit as of 2016.
Automated sites check for basic rules, spelling errors and mistakes in verb tenses and make suggestions for corrections. PaperRater rates written work in six categories including word choice, vocabulary, style, passive voice and grammar. The site assigns a grade and shows the writer's average in each subject compared to others in the same educational bracket.
Grammarly requires free registration and checks for 250 grammar rules, contextual spelling errors and makes suggestions taken from the context of an uploaded document. There are add-ons for Microsoft Word and Firefox available, and access to advanced features involves a paid subscription.
HGPublishing has an option for new clients that provides a free personalized edit of 500 words. Upload documents or submit them through an online form along with an email address and comments and the service returns an edited version. When using the paid service, the editors send the first 300 words of a document to clients within a selected time frame. If the edit isn’t satisfactory, the work is free.
With Proofreading.com’s free sample edit, clients upload a document and include details about the project including the length and turn around time. The editors return the documents within 24 hours.