Clean text before and after AI

Scan your prompt for sensitive data before pasting it into an AI assistant. Then clean the AI's output before reusing it in email, documents, or anywhere else. Both directions covered, both tools free, both running entirely in your browser.

Free browser-local text privacy tools for AI workflows. Scan prompts for sensitive data before sending to AI, then clean AI output before reusing it. Both tools run entirely in your browser — nothing uploaded to our servers.

Featured

Use the prompt checker before sending text to AI, or the text cleaner after getting a response you want to reuse.

AI Prompt Privacy Checker — Remove Sensitive Data Before AI

AI Prompt Privacy Checker scans text for personal information and removes it before you paste into ChatGPT, Claude, Gemini, or Copilot. Paste any text — a customer email, a work document, a debug log, or draft notes — and click Scan. The tool automatically finds and replaces sensitive details including email addresses, phone numbers, national ID numbers, credit card numbers, bank account numbers, API keys, passwords, IP addresses, street addresses, dates of birth, and more. Everything runs inside your browser — nothing is sent to a server. If the scanner replaces something it shouldn't have, you can restore individual items with one click. You can also add your own labels to manually label anything the scanner missed. Free, no sign-up required.

AI Text Cleaner — Remove Markdown and Hidden Characters

Free browser-local AI text cleaner for cleaning up AI output before reuse. Paste AI-generated text, choose the cleanup options you want, and remove markdown syntax, hidden Unicode, extra whitespace, filler phrases, emojis, and HTML tags. The cleaned text replaces the original in the same textarea. Your text never leaves your browser.

All AI Text and Prompt Privacy Tools — Clean Before You Send

AI Prompt Privacy Checker — Remove Sensitive Data Before AI

AI Prompt Privacy Checker scans text for personal information and removes it before you paste into ChatGPT, Claude, Gemini, or Copilot. Paste any text — a customer email, a work document, a debug log, or draft notes — and click Scan. The tool automatically finds and replaces sensitive details including email addresses, phone numbers, national ID numbers, credit card numbers, bank account numbers, API keys, passwords, IP addresses, street addresses, dates of birth, and more. Everything runs inside your browser — nothing is sent to a server. If the scanner replaces something it shouldn't have, you can restore individual items with one click. You can also add your own labels to manually label anything the scanner missed. Free, no sign-up required.

AI Text Cleaner — Remove Markdown and Hidden Characters

Free browser-local AI text cleaner for cleaning up AI output before reuse. Paste AI-generated text, choose the cleanup options you want, and remove markdown syntax, hidden Unicode, extra whitespace, filler phrases, emojis, and HTML tags. The cleaned text replaces the original in the same textarea. Your text never leaves your browser.

Related guides

AI privacy basics

AI Data Retention Questions Before Sharing

A practical checklist for reviewing AI data retention before sharing prompts or files. Learn which provider settings, account types, storage periods, model-training controls, and audit realities matter before private content leaves your browser.

AI privacy basics

AI Privacy Checklist Before Using ChatGPT, Claude, or Gemini

A before-AI privacy workflow for reducing exposure before content reaches an AI provider. Decide what the model actually needs, use automatic detection plus review controls to replace sensitive strings with placeholders, check visible and hidden file data, verify the cleaned copy, and then review the privacy controls for the account you are using.

AI privacy basics

Browser-Local vs Cloud AI Privacy Tools

A comparison of browser-local and cloud AI privacy tools. Learn when local cleanup is safer, when cloud services may still be useful, and how to decide which workflow fits prompts, files, screenshots, PDFs, and metadata.

AI privacy basics

Browser-Local vs Extension vs Cloud Privacy Tools

A decision guide for choosing between browser-local web tools, browser extensions, and cloud privacy tools before using AI. Compare data flow, permissions, repeat-use convenience, file support, audit needs, extension host access, and when each approach fits prompts, screenshots, PDFs, metadata, and team workflows.

AI privacy basics

Verify Browser-Local Processing With the Network Tab

A screenshot-backed verification guide for checking Freshmii's browser-local AI privacy tools. Learn what network activity is expected, what would be suspicious, and how to confirm there is no upload request after scanning, redaction, or metadata cleanup.

Prompt privacy

Anonymize Customer Support Prompts Before AI

A support-team guide to anonymizing customer prompts before AI. Learn how to sanitize customer email before AI, replace identifiers with useful placeholders, preserve support context, avoid leaking screenshots, and review AI output before sending it back.

Prompt privacy

Remove Secrets From Code Before Asking AI

A developer-focused guide to cleaning code, logs, config, .env files, and stack traces before AI assistance. Use a practical checklist, safe placeholders, and before-and-after log examples to remove API keys before asking AI and sanitize logs before AI debugging.

Prompt privacy

What Not to Paste Into AI Prompts

A practical guide to prompt privacy. Learn which categories of text should be treated as no-paste by default, how automatic detection plus review controls can replace sensitive strings with useful placeholders, and when a sanitized prompt is safer than a full copy of the original note, log, email, or document excerpt.

File upload privacy

Convert Files to Excerpts Before Uploading to AI

A guide to replacing full file uploads with sanitized excerpts. Learn when to paste text instead of uploading a document, how to preserve useful context, and when a cleaned file is still the better workflow.

File upload privacy

Supported File Types and Privacy Fields

A source-backed reference for Freshmii supported file types and privacy fields. Compare which formats can expose GPS, author names, timestamps, document properties, visible pixels, AI workflow metadata, comments, tracked changes, credentials, and other sensitive data before AI upload.

Image metadata privacy

Strip AI Image Prompts and Workflow Metadata

A guide to AI image metadata before upload or reuse. Learn what prompts, seeds, workflow data, C2PA-style provenance, and editor metadata can expose, and how to inspect and remove sensitive fields before sharing with AI.

Screenshot redaction

Blur vs Blackout Screenshot Redaction

A screenshot redaction guide comparing blur, pixelation, cropping, and solid blackout before AI upload. Learn why reversible or weak visual masking is risky, when cropping is better, and how to verify the exported image.

Screenshot redaction

Redact Browser Screenshots Before AI Uploads

A browser-screenshot privacy guide for AI workflows. Learn what browser chrome and web-app UI can reveal, how to crop or black out sensitive areas, and how to verify the exported screenshot before upload.

Screenshot redaction

Redact Screenshots Before Asking AI to Analyze Them

A screenshot privacy guide for AI workflows. Learn what screenshots commonly reveal, how to redact visible details before upload, when cropping is not enough, and how to verify an exported image before asking an AI assistant to analyze it.

PDF redaction

Redact PDFs Before Uploading Them to AI

A PDF privacy guide for AI uploads. Learn why visible redaction and metadata cleanup are separate jobs, how to verify a redacted PDF, and when to use local PDF redaction before sharing statements, contracts, forms, reports, or case documents.

Document metadata privacy

Clean DOCX Metadata Before Sharing Documents with AI

A DOCX privacy guide for AI workflows. Learn what document metadata and hidden parts can reveal, how to inspect supported DOCX fields locally, why metadata cleanup does not rewrite visible text, and when to sanitize excerpts instead of uploading a full document.

Document metadata privacy

Remove Comments and Tracked Changes Before AI

A document privacy guide for comments and tracked changes before AI upload. Learn why final-looking DOCX files can still contain review history, how to inspect hidden parts, and when to export a clean excerpt instead.

Document metadata privacy

Sanitize Resumes and HR Documents Before AI

An HR privacy guide for using AI with resumes and employee documents. Learn what to remove, when to use placeholders, how to avoid hidden DOCX metadata, and how to review AI output before it becomes part of a people process.

AI output cleanup

Check AI Output for Private Data Echoes

A guide to reviewing AI-generated output for private data echoes. Learn why sanitizing the input is not enough, what strings to search for, how to handle placeholders, and how to clean formatting without skipping human review.

AI output cleanup

Clean AI Output Before Reusing It

A practical guide to cleaning AI-generated text before reuse. Remove markdown clutter, hidden characters, copied HTML, filler language, accidental private echoes, and placeholder mistakes while keeping a clear review boundary between formatting cleanup and factual approval.

AI output cleanup

Remove Hidden Unicode From AI Output

A guide to hidden Unicode in AI output. Learn what invisible characters can do, why they matter for documents, prompts, code, forms, and publishing, and how to clean text before reuse without changing its meaning.

Frequently asked questions

How do I remove sensitive data from a prompt before pasting it into ChatGPT?
Paste your text into the AI Prompt Privacy Checker and click Scan. It automatically finds and replaces emails, phone numbers, API keys, SSNs, and 30+ other sensitive types with labels like [EMAIL] or [PHONE]. Review the results, restore anything flagged incorrectly, manually label anything missed, then copy the cleaned prompt into the AI — the real values never leave your browser.
What's the difference between the Prompt Checker and the Text Cleaner?
They cover the two sides of AI work. Use the AI Prompt Privacy Checker before you send text — it automatically detects common sensitive data, then lets you review, restore, or manually label anything missed. Use the AI Text Cleaner after the AI responds — it strips markdown, hidden characters, and filler from the output before you reuse it in an email, doc, or CMS.
Do these text tools upload my text or require an account?
Neither. Both tools run entirely in your browser, so nothing you paste is sent to our servers, and there's no sign-up. The prompt scanner even runs offline once the page has loaded — you can confirm it in your browser's DevTools Network tab.
Can I use these before pasting into Claude, Gemini, or Copilot?
Yes. The tools work with any AI assistant — clean your prompt or output here, then paste the cleaned version into ChatGPT, Claude, Gemini, Copilot, or any other tool. The AI only ever sees the version you've already cleaned.

Explore More