Paste your message
Copy any text you want to improve — an email draft, a Slack message, a text, a cover letter, or anything you're about to send — and paste it into the tool.
Free AI grammar & tone fixer
Paste any message and fix the grammar, sharpen the clarity, or shift the tone — from too casual to professional, or the other way around. Copy the result into email, Slack, or any app. No sign-up required.
Fix your message
Paste the text you want to improve, choose a fix goal, then generate a polished version you can copy and send.
Step 01
Paste your message
0/1200
Step 02
What should we fix?
Step 03
How long should the result be?
Optional
Extra instructions
How the free AI grammar
and tone fixer works
Three steps from rough message to polished copy — the whole thing takes under 20 seconds, and you never have to manually fix a single sentence.
Choose what to fix
Pick Fix Grammar to correct errors, Improve Clarity to simplify and sharpen, or Shift Tone to change the register. Add any specific extra instructions in the optional field.
Copy and send
Your fixed message appears instantly — same meaning, better writing. Choose Keep Length, Shorter, or Standard, then copy and paste it wherever you're sending it.
Three fixes. One tool.
Every message problem fits into one of three categories — pick the right fix and the AI handles the rest.
Fix grammar
Grammar & spelling fixer
Corrects spelling mistakes, grammatical errors, punctuation issues, and awkward sentence structure — without changing your meaning or voice.
Before
I wanted to touch base in regards to the report which i sended last week, did you had a chance to reviewed it yet?
After
I wanted to follow up on the report I sent last week — have you had a chance to review it yet?
Improve clarity
Clarity & simplicity rewriter
Rewrites wordy, confusing, or over-complicated sentences so the point lands clearly — without removing any of the substance.
Before
Due to the fact that there has been a significant amount of unexpected circumstances that have arisen, we find ourselves in a position where we are unable to proceed.
After
Due to unexpected circumstances, we're unable to proceed at this time.
Shift tone
Tone converter
Changes the register of your message — from casual to professional, or from overly formal to warm and conversational — while keeping the exact same meaning.
Before (too casual)
hey so like I was thinking maybe we could push the deadline a bit?? lmk what u think lol
After (professional)
I wanted to check whether there might be any flexibility on the deadline — please let me know your thoughts.
Why this free AI grammar fixer
works better
Most grammar tools underline errors and leave you to fix them. Excuseify rewrites the whole message so you can copy it and move on.
Full rewrites, not just red underlines
Unlike traditional grammar checkers that flag errors for you to fix manually, Excuseify rewrites the entire message according to your chosen goal — grammar, clarity, or tone — in one click.
Three distinct fix modes
Fix Grammar, Improve Clarity, and Shift Tone do three genuinely different things. You're not guessing what the tool will do — you choose the exact type of improvement you need.
Under 20 seconds start to finish
Paste, choose, fix, copy. No browser extension to install, no account to create, no dashboard to navigate. Your improved message is ready before you've finished thinking about how to fix it yourself.
Works on any message format
Emails, Slack messages, WhatsApp texts, DMs, reports, cover letters, social posts — paste any written content and the AI fixes it in context. Not just formal business writing.
Your messages stay private
Excuseify does not store the messages you paste or the fixed versions it generates. Your content is used only to produce the result in your current session — never saved, shared, or used for training.
Free — no account, no limit
No sign-up, no email address, no free tier with a usage cap. Fix as many messages as you need, as many times as you want, with no paywall and no upgrade prompt.
Excuseify vs Grammarly
vs ChatGPT
See how a purpose-built AI grammar and tone fixer compares to the tools you've probably already tried.
| Feature | Excuseify Our tool | Grammarly | ChatGPT |
|---|---|---|---|
| Full message rewrite Not just flagging errors | ✓ | ✕ | Only with prompting |
| Tone shifting Casual to professional & back | ✓ | Premium only | Manual prompting |
| No account required Open and use immediately | ✓ | ✕ | ✕ |
| Completely free No usage cap or credit system | ✓ | Limited free tier | GPT-4 is paid |
| No browser extension needed Works in any browser, any device | ✓ | Extension recommended | ✓ |
| Fix grammar, clarity & tone in one tool Three fix modes, one place | ✓ | Separate features | ✕ |
| Messages not stored or used for training Private by default | ✓ | Depends on plan | Depends on settings |
3
Fix modes —
grammar, clarity, tone
grammar, clarity, tone
<20s
Average time from
paste to fixed message
paste to fixed message
0
Sign-ups needed
to start fixing
to start fixing
∞
Messages you can fix —
no cap, ever
no cap, ever
Who uses the AI grammar
and tone fixer
From quick texts to formal reports — anyone who writes messages they're not fully confident in before sending.
Professionals & office workers
Fix emails to managers and clients, sharpen reports, and make rushed Slack messages sound considered — without spending ten minutes on a two-line reply.
Students
Fix grammar in assignments, sharpen the clarity of essays, and make emails to lecturers sound appropriately professional rather than overly casual.
Non-native English speakers
Write confidently in English by fixing grammar errors and shifting the tone to match what's expected — without needing to know every grammatical rule.
Remote workers
Communicate clearly across time zones and cultures. Fix tone mismatches before they cause confusion and make every written message land the right way.
Founders & freelancers
Sound professional in client emails and pitches without hiring an editor. Fix the grammar, sharpen the clarity, and send with confidence.
Everyday writers
Turn a rambling WhatsApp voice-note transcript into a clear message, or make a text sound less passive-aggressive before you send it at 11pm.
What users say about the
grammar and tone fixer
Real messages. Real improvements. Considerably less second-guessing before hitting send.
English is my second language and I always worry my emails sound wrong. The Shift Tone option is incredible — I paste my draft and it comes back sounding like a native speaker wrote it. I use it every single day at work now.
Nadia B.
Project manager
I write quickly and my first drafts are always a mess grammatically. I used to spend ages cleaning them up. Now I just paste and fix. The Improve Clarity mode especially — it cuts out all the filler I don't even notice I'm writing.
James T.
Freelance copywriter
I had to email my dissertation supervisor after missing a meeting and had no idea how to make it sound professional without being overdramatic. Pasted my draft, hit Shift Tone, and got something I'd never have written on my own. She replied saying it was no problem.
Aisha K.
Postgraduate student
Free AI grammar and tone fixer —
common questions answered
Everything you need to know before you start fixing.
Is the Excuseify grammar and tone fixer free to use?
Yes — completely free, no account or sign-up required. Paste any message, choose what to fix, and generate instantly. There are no usage limits, no premium tiers, and no paywall — fix as many messages as you need.
How does the AI grammar and tone fixer work?
Paste the message you want to improve, choose your fix goal — Fix Grammar, Improve Clarity, or Shift Tone — pick a length preference, add any optional extra instructions, then click Fix Message. The AI rewrites the message according to your chosen goal and returns a polished version ready to copy and send.
What kinds of messages can I fix?
Any written message — work emails, Slack messages, WhatsApp texts, DMs, social media posts, reports, cover letters, school assignments, and anything else you need to improve before sending. The tool works on short messages and longer documents equally well.
What is the difference between fix grammar, improve clarity, and shift tone?
Fix Grammar corrects spelling mistakes, grammatical errors, punctuation issues, and sentence structure without changing your meaning or style. Improve Clarity rewrites confusing, wordy, or over-complicated sentences to make them easier to understand. Shift Tone changes the register of the message — from casual to professional, or from formal to conversational — while keeping the same core meaning.
Can I make a casual message sound more professional?
Yes — this is exactly what the Shift Tone option is built for. Paste your casual message, select Shift Tone, and the AI rewrites it in a professional register appropriate for work emails, formal communications, or any situation where your original phrasing was too informal. It works the other way too — making overly stiff writing sound warmer and more natural.
How is this different from Grammarly?
Grammarly primarily flags grammar and spelling errors inline for you to fix manually. Excuseify rewrites the entire message according to your chosen goal — grammar, clarity, or tone — in one step. It also requires no browser extension, no account, and has no usage cap. The Shift Tone feature in particular goes well beyond what a traditional grammar checker does.
Can I use extra instructions to guide the fix?
Yes — the optional Extra Instructions field lets you add specific guidance such as "keep it under three sentences", "avoid using the word very", "maintain a friendly sign-off", or "don't change the opening line". The AI incorporates your instructions into the rewrite alongside the chosen fix goal.
Does Excuseify store the messages I paste or generate?
No. Excuseify does not store the content of messages you paste into the tool or the fixed versions it generates. Your content is used only to produce the result in your current session and is not saved to our servers, shared with third parties, or used to train external models.
How is this different from using ChatGPT to fix writing?
ChatGPT requires you to write a prompt explaining what you want fixed, specify the tone, define what to keep, and iterate until the result is right. Excuseify's grammar and tone fixer is pre-configured — paste the message, choose a fix goal from a menu, and get a usable result immediately with no prompting experience needed. It's faster and requires no prior knowledge of how to talk to an AI.
Your fixed message is 20 seconds away
Stop second-guessing every word. Paste it, choose your fix, and copy the result.
Free · No sign-up · Works on any message
More from Excuseify
Need a full email from scratch? Try the AI Email Generator. Replying to a thread? Use the AI Email Reply Generator. Prefer short messages? Use the AI Excuse Generator. Browse all tools on the tools page.