Compare
Offsend Browser Extension vs PromptShield
Short answer: Pick Offsend Browser Extension if you want local secret masking for AI chats; pick PromptShield if you want one-click prompt optimization for web-based AI chats. Offsend Browser Extension is free; PromptShield has a free plan, paid from $7.99/month.
Offsend Browser ExtensionMask secrets before they reach ChatGPT, Claude, or Gemini..png?width=96){kind=icon}
PromptShieldWrite better AI prompts before you hit send.Which to pick
Pick Offsend Browser Extension if you want…
- Local secret masking for AI chats
- Privacy-first secret masking
- A free, open-source tool
Pick PromptShield if you want…
- One-click prompt optimization for web-based AI chats
- Integrations with Meta AI (on PromptShield's list, not Offsend Browser Extension's)
Side by side
- What it is
- Offsend Browser Extension:Offsend is a local-first browser extension that detects and masks secrets in prompts before they reach AI chat services.
- PromptShield:PromptShield is a Chrome extension that reviews and improves prompts in AI chat interfaces before you send them.
- Best for
- Offsend Browser Extension:Local secret masking for AI chats
- PromptShield:One-click prompt optimization for web-based AI chats
- Who it’s for
- Offsend Browser Extension:Developers and teams who paste code, logs or data into AI chat tools.
- PromptShield:Developers and users of AI chat tools who want clearer, safer prompts.
- Pricing
- Offsend Browser Extension:Free
- PromptShield:Freemium
- Starting price
- Offsend Browser Extension:Free
- PromptShield:$7.99/month (Pro)
- Free plan or trial
- Offsend Browser Extension:Free to use
- PromptShield:Free plan (Free)
- Plans
- Offsend Browser Extension:—
- PromptShield:Free $0 · Pro $7.99 per month
- Open source
- Offsend Browser Extension:Yes, 1 GitHub stars
- PromptShield:—
- Works with
- Offsend Browser Extension:ChatGPT, Claude, Gemini, Grok, Perplexity, DeepSeek
- PromptShield:ChatGPT, Claude, Gemini, Perplexity, Grok, DeepSeek, Meta AI
Offsend Browser Extension features
- Local detection. Scans prompts in the browser without sending data to any server.
- Automatic masking. Replaces detected secrets with readable placeholders like {{API_KEY_1}}.
- Restore capability. Keeps encrypted, time-limited mappings to restore original values locally.
- Custom rules. Add JavaScript regex patterns to detect organization-specific secrets.
- Mode selection. Choose Warn, Auto-mask, or Block behavior when secrets are found.
- Built-in detectors. Detect emails, phones, API keys, tokens, private keys, credit cards, IPs, UUIDs and more.
PromptShield features
- One-click optimization. Transforms a rough prompt into a detailed instruction with a single click.
- Context & clarity checks. Identifies missing context, vague wording, and suggests improvements.
- Sensitive data guard. Detects potentially sensitive information and can run OCR locally on images.
- Prompt library & history. Keeps a local library of optimized prompts and history on your device.
- Personalization & coach. Learns from your choices locally and can suggest display language.
- Cross-chat support. Works with ChatGPT, Claude, Gemini, Perplexity, Grok, DeepSeek, and Meta AI.
Offsend Browser Extension vs PromptShield FAQ
What is the difference between Offsend Browser Extension and PromptShield?+
Offsend Browser Extension: Offsend masks secrets before they reach AI, emphasizing privacy rather than prompt improvement.
Should I use Offsend Browser Extension or PromptShield?+
Pick Offsend Browser Extension if you want local secret masking for AI chats, privacy-first secret masking or a free, open-source tool. Pick PromptShield if you want one-click prompt optimization for web-based AI chats or integrations with Meta AI (on PromptShield's list, not Offsend Browser Extension's).
Is Offsend Browser Extension or PromptShield free?+
Offsend Browser Extension is free. PromptShield has a free plan; paid plans start at $7.99/month (Pro).
Which is cheaper, Offsend Browser Extension or PromptShield?+
Offsend Browser Extension is free, so it costs less. PromptShield starts at $7.99/month (Pro).
Is Offsend Browser Extension or PromptShield open source?+
Offsend Browser Extension is open source (Offsend/browser-extension on GitHub, Apache-2.0 license). DevHunt has no public source repository on record for PromptShield.
Do Offsend Browser Extension and PromptShield integrate with the same tools?+
Partly. Both list ChatGPT, Claude, Gemini, Grok and 2 more. PromptShield also lists Meta AI.
On DevHunt
Offsend Browser Extension
11 upvotes · Launched on DevHunt on Jun 30, 2026
PromptShield
12 upvotes · Launched on DevHunt on Sep 22, 2026
Based on each tool's website and DevHunt data. Details may change; check the official sites.