Custom tones

ReWryte ships with four built-in tones. Custom tones let you define rewrite rules for any specific context — your email style, team Slack shorthand, support reply format, or anything else.

Built-in tones

Four tones are included out of the box and cannot be edited or deleted — only toggled on or off.

Tone	Style	Example output
Professional	Formal, clear, workplace-appropriate	"I'm following up regarding the deadline and expected timeline."
Casual	Friendly, conversational, relaxed	"Hey, just checking in on the timeline from your side."
Polite	Courteous, considerate, respectful	"Would you kindly share an update when you have a moment?"
Assertive	Direct, confident, action-oriented	"Please share the final update by end of day."

How to create a custom tone

Open Main Window → Tones.
Click + Add custom tone (top-right). A form appears with four fields.
Fill in all four fields — see the field guide below.
Click Add tone. The tone immediately appears in the popup's tone strip.

Field	Purpose	Tips
Name	Label shown in the popup strip	Keep it under 15 characters — it appears on a chip
Description	Short summary shown under the name	One phrase, e.g. "Warm, solution-focused"
System prompt	The instruction the AI receives before your text	Be specific — see the guide below
Example output	Optional preview of what the tone produces	Helps you remember what this tone is for

Tip: You can toggle any tone (built-in or custom) on or off in Main Window → Tones. Disabled tones are hidden from the popup strip without being deleted.

Writing effective system prompts

Your system prompt is the instruction the AI receives before seeing your text. The quality of your prompt directly determines the quality of the rewrite. Always be specific about:

Principle	Example
Target audience and register	Target busy decision-makers who need the key point in under 100 words.
Output format	Use bullet points if the content benefits from it.
Length constraints	Keep it to 1–4 sentences.
Things to avoid	No filler sentences, no greeting, no sign-off needed.
Things to fix	Fix any grammar or spelling issues.
End with this exact phrase	Return only the rewritten text.

Always end with: Return only the rewritten text.
This prevents the AI from adding commentary, explanations, or alternative options — you only get the rewrite itself. Without this, many models will wrap the result with "Here is the rewritten text:" or offer multiple versions.

Weak prompt

Rewrite this professionally.

Strong prompt

Rewrite the following as a polished, ready-to-send business email. Use a confident, respectful tone. Fix grammar and spelling. Keep it concise — no padding. Return only the rewritten text.

Starter prompts

Copy any of these prompts directly into the System Prompt field when creating a new tone.

✉️

Email Pro

Polished, professional email — ready to send

System prompt

Rewrite the following text as a polished, professional email. Use clear, confident language with a respectful tone. Keep it concise — no filler sentences. Ensure it reads as complete and ready to send. Fix any grammar or spelling issues. Return only the rewritten text.

Example output

I wanted to follow up on our previous conversation and confirm the next steps. Please let me know your preferred timeline so we can align accordingly.

Best for Client emails, formal follow-ups, meeting requests, project status updates, external stakeholder communication.

💬

Slack Pro

Brief, direct team chat — no fluff

System prompt

Rewrite the following text as a professional Slack message. Keep it short and direct — like a thoughtful teammate, not a formal email. Plain language, no jargon. Get to the point immediately. No greeting, no sign-off needed. Return only the rewritten text.

Example output

Quick heads-up: deadline moved to Thursday. Let me know if that creates a blocker on your end.

Best for Team updates, async check-ins, standup notes, quick status messages, cross-team coordination.

📊

Executive Summary

Key points only — crisp, no filler

System prompt

Rewrite the following text as a concise executive summary. Extract the key points, decisions, risks, or outcomes. Use bullet points if the content benefits from it. Lead with the most important information. Maximum 5 bullets or 5 sentences unless the content demands more. Use confident, neutral business language. Return only the rewritten text.

Example output

• Project is on track for Q3 delivery. • Two active blockers: vendor delay and resource gap. • Recommended action: escalate vendor contract by Friday. • No budget impact at this stage.

Best for Status reports, meeting recaps, project updates for leadership, investor updates, board summaries.

🎧

Support Reply

Warm, helpful customer support response

System prompt

Rewrite the following text as a warm, helpful customer support reply. Acknowledge the user's concern or frustration first. Provide a clear, actionable response. Close with an offer to help further. Be friendly and genuine — not robotic or overly formal. Fix any grammar issues. Return only the rewritten text.

Example output

Thanks for reaching out — I completely understand how frustrating this must be. Let me look into this right away. Could you share your order number so I can pull up the details and get this sorted for you?

Best for Customer support replies, complaint responses, helpdesk tickets, app store review responses, user feedback replies.

Setting your default tone

Your default tone is pre-selected every time the ReWryte popup opens — eliminating a click on every single rewrite.

Open Main Window → Tones.
Find the tone you use most frequently.
Click "Set default". A blue Default badge appears on that tone.

The default is applied immediately — the next time you press ⌘+⇧+R, that tone is already selected.

Your main context	Recommended default
Writing emails all day	Email Pro
Mostly in Slack	Slack Pro
Customer support role	Support Reply
Executive / leadership	Executive Summary
Mixed / general	Professional (built-in)

Managing tones

Action	How
Enable / disable	Main Window → Tones → toggle the switch on any tone card. Disabled tones are hidden from the popup but not deleted.
Reorder tones	Main Window → Tones → use the ▲ ▼ arrow buttons on each card. The order here is the order in the popup.
Edit a custom tone	Main Window → Tones → click "Edit" on any custom tone card to update the name, description, system prompt, or example.
Delete a custom tone	Main Window → Tones → click "Delete" on a custom tone to permanently remove it. Built-in tones cannot be deleted, only disabled.
Set default tone	Main Window → Tones → click "Set default" on the tone you want pre-selected when the popup opens.

Next steps

Getting started Full tutorial from install to first rewrite. Read → API key setup Connect OpenAI, Anthropic, Gemini, or Groq. Read → Local AI Run Qwen 2.5 on-device — no API key needed. Read →