QuillBot is a state-of-the-art paraphrasing tool. It is the best article rewriter available, and can completely paraphrase an entire article for free. Simply input a sentence, and hit the "Quill It" button. QuillBot will then rephrase the content while maintaining the original meaning. You can then click on any of the words or phrases to have a drop down thesaurus appear which can then provide further edits in order to optimize your sentence. It is the best article spinner out there. We will even provide statistics to how fluent the sentences are, and how much they have changed. QuillBot can also function as a grammar checker and fluency enhancer. In addition to this, it can provide you with creative suggestions on your sentences. We labeled the software as a "smart thesaurus for sentences" or a full-sentence thesaurus. QuillBot underlying technology uses complete machine learning. This means that when you interact with the website, you are providing data that will be used to improve QuillBot's proficiency. This also means that the version you are using will be the worst version of the model, and that it will constantly improve. Users have been uitilizing QuillBot for a variety of purposes. They use QuillBot as an SEO optimizer tool, in order to improve their writing, or simply get over writers block. The language that QuillBot produces is natural, and will improve overtime as well. Our mission is to achieve human-level paraphrasing. Once we achieve this task, we will aim to produce language in particular linguistic styles or degrees of sophistication. We will even allow users to control the degree of permutation that the paraphrasing tool produces. This will give users complete control over QuillBot and the ability to manipulate language to meet their needs. While our goals our ambitious, we see a clear path forward towards achieving them!
If you are a writer, then you know that sometimes you are likely to get stuck trying to find that “perfect word or phrase”. To ensure that you can fully benefit from this paraphrasing tool online, we’ve added more than 500,000 synonyms and we keep adding new ones. This gives us the opportunity to provide you quality articles with words and phrases that best fit in the context.
Using Spinbot you can instantly spin (or rewrite) a chunk of textual content up to 10,000 characters in length (or about 1000 words), which is much longer than an average website or freely-distributed article. With a single click you can turn your old blog post or website article into a completely new one, thereby doubling the payoff you get in return for the time and energy you have already invested into creating quality website content. Spinbot is lightning fast as well as free, so there is potentially no limit to the amount of free web content that you can create using this tool.
Sometimes the tools called paraphrasing tool, why it is so called? As the tool use the logic of changing words according to its synonyms to make an article unique and meaningful. If we expand the main logic behind the tool use the word synonyms of targeted article that you will rewrite or spin, giving you the options to replace the word from its dictionary suggested by the boot as well as option to write your own, it’s simple but it’s superb.

Imo it is not possible for google to detect properly spun content, it is not worth computing power it requires. They can do this using ngrams for example, but it is uses a lot of queries. And for example article spinner I coded beats this algo, so google cant detect that the content is spun. Manual spinning is also good but it takes more than 30 minutes per article.
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