Brand Guideline Checker

Audit any document against your brand guidelines for tone, color and logos.

Tone, Color & Logo Checks

Supports PDF, TXT and more

You“Is the tone of this post too casual?”

Fyne Bot“Yes, your guide requires m..”

or drop your file here

Check Any Draft in 3 Steps

Review tone, terminology, and messaging against the brand rules you share.

Paste Your Rules

Paste your tone rules and banned terms straight into the chat. Nothing is stored.

Upload the Draft

Upload the draft. The agent reads it against the rules you just gave it.

Audit & Correct

Get every off-brand line flagged with a rewrite, then copy the corrected text.

Brand Compliance

Check the draft against the brand rules you provide.

Review a PDF draft against your brand guidelines. Add tone rules, approved terminology, and messaging requirements to the chat, then ask for specific passages that need attention before the copy is published.

Review Brand Voice

Check the tone against your guidelines.

Check Approved Terms

Find wording that breaks your brand rules.

Align the Message

Review the claims your draft emphasizes.

Draft_Blog_v2.pdfChecking against: BrandBook_2026.pdf

Please check the intro paragraph for tone alignment.

I found a tone violation. Your style guide mandates a "professional, authoritative, yet approachable" voice, and explicitly bans the phrase "Hey guys." Here is a suggested rewrite:

Draft Text (Off-Brand)Hey guys! We are super pumped to finally drop this new feature for you all

AI Rewrite (On-Brand)Welcome, team. We are excited to introduce a new feature designed to optimize your workflow.

p.4Copy

Review copy against your brand rules.

Add your guidelines to check tone, approved terms, and messaging in the same session.

Brand Voice Checks

Add your brand guidelines and ask whether the draft matches your tone. Review wording that feels too formal, too casual, or off-brand.

Approved Terminology

Provide approved product names and terms to avoid. Ask the agent to flag inconsistent wording and suggest changes that follow your rules.

Review External Copy

Check agency or freelance work against the brand rules you provide. Review the flagged passages and agree on changes before publishing.

Explain, Summarize, Ask

Select text in your PDF to explain a term, summarize a passage, or ask a question. Explore the detail you need without retyping it into chat.

Highlighted Sources

Click a page citation to open your PDF at the source. When a text match is found, the passage is highlighted so you can check the AI answer.

Export Tables as CSV

Download tables from AI answers as CSV files. Keep the rows and columns ready for Excel, Google Sheets, or your next document analysis.

Keep Your Brand Copy Consistent

Review tone, terminology, and messaging against the guidelines you provide.

Content Managers

Review product descriptions and tone in a marketing draft. Share the relevant brand rules and ask where the wording needs closer attention.

Creative Agencies

Check a client draft against the voice and terminology you provide. Explore suggested edits and decide which changes fit the intended audience.

Brand Teams

Review local copy for consistent product names and messaging. Identify passages to discuss with your team before approving the draft.

Document Privacy

How your files are handled during and after your session.

No AI Training

Your documents are used for your session and are never used to train AI models.

Encrypted Transfers

TLS protects document transfers between your browser and FynePDF.

Auto-Deletion

Your file is deleted within 24 hours of upload, unless you save it to your Library.

Read how we handle document data and how to contact us about access, export, or deletion.

Your draft is processed to review wording against the brand rules you provide. FynePDF staff do not manually open or review your file contents.

AI features may send document content to the Google Gemini API to produce the output you request. Documents are not used to train AI models. Temporary files follow the deletion policy; saved documents follow the Library storage policy.
Read our full Security Policy.

Frequently Asked Questions

Can it actually learn my specific brand voice?

Within a session, yes. Paste your brand rules, tone description, banned terms, approved phrasing, examples of copy that's right, and every draft you check in that session is measured against them, with each finding pointing back to the rule it breaks. What it doesn't do is remember between sessions: there's no training and no stored profile, so you paste the rules each time you start. In practice that's a keyboard shortcut, and it means your brand book is never sitting on someone else's server.

Does it check visual elements like logos and colours?

Not the visuals themselves, it reads text, so it can't look at your logo, measure a colour, or tell you a mark has been stretched. What it does catch is everything written about them: a draft that says "light blue" where your guide specifies Navy Blue #005FDB, a product name written three different ways, a tagline that's been paraphrased, an old strapline that should have been retired. In practice that's where most brand drift actually happens, because copy changes hands far more often than artwork does.

Can I use this to check freelance or agency copy?

Yes, and it's the most common way people use it. Paste your brand rules, upload or paste the delivered draft, and ask what's off, the agent returns each violation with the rule it breaks and a suggested rewrite, which makes the feedback specific rather than a matter of taste. That's usually the hard part of managing external writers: "this doesn't feel like us" is impossible to action, while "the guide bans 'Hey guys' and this opens with it" is a two-minute fix.

Can I use the Brand Checker for free?

Yes. Read a document overview without signing in, then try one AI answer by typing a question, choosing a suggestion, or running the analysis. Each new upload gets one answer, shared across tools and agents. A paid plan unlocks further interactions within its AI allowance.

How secure are my files and data?

File transfers use TLS encryption. AI features may send document content to the Google Gemini API to generate the output you request. Documents are not used to train AI models. Temporary AI files are deleted within 24 hours of upload; files saved to your Library follow the Library storage policy. Read the Privacy Policy for details.

Can I check several pieces from the same campaign?

One document per session, so a campaign gets checked a piece at a time, opening the ad in one session, the landing page in another. Paste the same rules at the start of each and the standard applied is identical, which is what consistency across a campaign actually requires. It's more clicks than a batch upload, and it has one advantage: each piece gets its own findings list you can send to whoever wrote it, rather than a merged report nobody owns.

What should I put in the brand rules I paste?

Less than you'd think. A sentence or two describing the voice, the words and phrases you never use, the ones you always use, how product names are written, and two or three lines of copy that are exactly right. That's usually enough to catch most drift. A full 40-page brand book works too, but the sections that drive findings are the voice guidance and the terminology lists, the typography and logo-clearspace pages don't affect a text check. If you're not sure, paste the voice and terminology sections first and add more if the results feel thin.

Is it any good at judging tone, or is that too subjective?

Tone is subjective, which is why the agent works from your rules rather than a general idea of good writing, it's checking your draft against what you told it, not against its own taste. That makes it reliable on the concrete things: banned terms, product naming, formality, phrasing you've explicitly ruled in or out. It's weaker on judgements a brand lead would make instinctively, and it separates confirmed violations from suggested improvements so you can tell which is which. Treat the first list as decisions and the second as a conversation.