The Best Tools for Editing a Manuscript (and What Each One Is For)

Search for the best tool to edit your manuscript and you get a wall of confident lists, most of them comparing things that do completely different jobs. That's the real problem: editing isn't one task. Tightening a sentence, checking whether the story works, and catching typos are separate jobs, and no single tool does all of them well. The honest question isn't "what is the best tool," it's "which job am I doing right now." Here's how the main tools sort out.

First, which job are you actually doing?

Editing happens in layers, roughly in this order: developmental (does the story work), line (does the prose read well), copy (is it correct and consistent), and proofreading (final typos). Picking a tool before you know which layer you're on is how authors waste money polishing scenes they later cut. If that order is fuzzy, start with our guide to what kind of editing your book actually needs, then come back.

Tools for line and language

ProWritingAid and Grammarly are the best-known here. They check grammar, style, clarity, overused words, sentence variety, and readability, and they're genuinely good at it. This is the right tool when your story already works and you want the prose to read cleanly. What they don't do is tell you whether the story works in the first place; they polish the lines, not the structure underneath. We lay out exactly where that boundary sits in Edith vs ProWritingAid and Grammarly.

Tools for story-level checks

This is where developmental help lives, and the tools take different shapes. AutoCrit pairs algorithmic prose reports with an AI story analyzer (we go deep on it in our AutoCrit review). Fictionary gives you a framework of story elements to evaluate your manuscript yourself, scene by scene. Marlowe emails you a whole-book assessment report. They're real tools, and they share two limits worth knowing: most read or analyze in pieces rather than holding the whole book at once, and all of them hand you a report and leave the interpreting and revising to you.

Writing tools aren't editing tools

Sudowrite, Novelcrafter, and NovelAI come up in these lists, but they're built to help you generate and draft, not to edit what you've written. They're useful at the writing stage and structurally the opposite of an editor: one puts words on the page, the other helps you make the words you wrote stronger. If you drafted with one of these and now need an honest edit, that's a real handoff, and we cover it in Edith vs Sudowrite.

A whole-book editor that reads and discusses: Edith

Edith sits in the gap most of these tools leave open: a developmental edit of your whole book that you can actually talk through. She reads your entire manuscript, up to 150,000 words, before she says a word, tells you what is working and what is holding the book back, and takes you through the edit one note at a time, answering questions as you go. She re-checks the whole book when you revise, and never rewrites your words. A first edit starts at $15. If you're weighing software against a person, Edith vs a human editor is an honest look at where each one wins.

So which should you pick?

• Story doesn't work yet, or you aren't sure: start with a whole-book developmental read, not a line tool.
• Story works, prose needs tightening: a line-and-grammar tool like ProWritingAid or Grammarly.
• You want a self-guided framework and enjoy doing the analysis yourself: a structured tool like Fictionary.
• You're still drafting: a writing tool, then edit afterward with something built for editing.
• Final pass before publishing: a proofreading check, last, after everything else is locked.