When you set a custom prompt in Perplexity to tailor how the AI responds, you expect it to stay saved for future sessions. But many users report that after closing the browser or switching devices, their custom prompt disappears. This breaks your workflow, especially if you rely on a specific instruction set for research or writing. The cause is usually a combination of browser cache interference and how Perplexity syncs custom prompts across devices. This article explains why the error occurs and gives you step-by-step fixes to make your custom prompt stick.
Key Takeaways: Fix the Custom Prompt Not Saved Error in Perplexity
- Clear browser cache and cookies: Removes corrupted data that prevents Perplexity from saving your custom prompt.
- Disable browser extensions: Ad blockers and script managers can block the save request from reaching Perplexity servers.
- Use Perplexity in incognito mode: Isolates the save process from extension interference and cache issues for testing.
Why Perplexity Fails to Save Your Custom Prompt
Perplexity stores custom prompts locally in your browser’s local storage and syncs them to your account via an API call. If the browser blocks this API call or the local storage gets corrupted, the prompt disappears after page refresh. The most common technical root causes are:
Browser Cache and Local Storage Corruption
When you visit Perplexity, the browser caches JavaScript and CSS files. If an old cache conflicts with the current version of Perplexity, the save button may not trigger the correct API endpoint. Local storage can also become corrupt if you close the browser while a save is in progress.
Extension Interference
Extensions that block scripts, manage cookies, or modify HTTP headers can stop the save request. Common culprits include uBlock Origin, Privacy Badger, and script blockers. These extensions see the save request as a tracker and block it.
Account Sync Delays
Perplexity syncs custom prompts to your account only when you are logged in and have a stable internet connection. If you save a prompt while offline or with a weak signal, the sync fails silently and the prompt is lost when you switch devices.
Steps to Force Perplexity to Save Your Custom Prompt
Follow these steps in order. Test after each step by setting a simple custom prompt, refreshing the page, and checking if it remains.
Step 1: Clear Browser Cache and Local Storage for Perplexity
- Open browser developer tools
Press F12 on Windows or Cmd+Option+I on Mac. This opens the developer tools panel. - Go to the Application tab
Click the Application tab in the developer tools. If you do not see it, click the >> arrow to reveal more tabs. - Clear local storage
In the left sidebar, expand Storage and click Local Storage. Right-click the perplexity.ai entry and select Clear. Then click Clear Site Data at the top of the Storage pane. - Reload Perplexity
Press F5 or Ctrl+R to reload the page. Log in again if needed and set your custom prompt. Click the Save button and refresh the page to verify.
Step 2: Temporarily Disable Browser Extensions
- Open extension management page
In Chrome, type chrome://extensions in the address bar. In Edge, type edge://extensions. In Firefox, type about:addons. - Disable all extensions
Toggle off each extension. Do not just disable ad blockers — disable all extensions to isolate the conflict. - Test save in Perplexity
Go back to Perplexity, set a custom prompt, and save it. Refresh the page. If the prompt stays, re-enable extensions one by one until you find the one causing the issue.
Step 3: Use Incognito Mode to Bypass Cache and Extensions
- Open an incognito window
Press Ctrl+Shift+N on Windows or Cmd+Shift+N on Mac. This opens a fresh browser session with no cache and no extensions. - Log in to Perplexity
Go to perplexity.ai and log in with your account credentials. - Set and save your custom prompt
Navigate to Settings > Personalization > Custom Prompt. Type your prompt and click Save. Refresh the page and verify it persists. - Return to normal browser
If the prompt saves successfully in incognito mode, the issue is caused by cache or extensions in your normal browser session.
Step 4: Check Account Sync and Log Out Then In
- Log out of Perplexity
Click your profile picture in the top right, then click Log Out. - Clear cookies for perplexity.ai
In Chrome, click the lock icon next to the URL, then click Cookies. Remove all cookies for perplexity.ai. In other browsers, use the settings menu to clear site cookies. - Log back in
Enter your credentials and navigate to Settings > Personalization > Custom Prompt. Set your prompt and click Save. Refresh the page and confirm the prompt is saved.
If Perplexity Still Fails to Save Your Custom Prompt
Custom Prompt Field Shows Empty After Saving
If the save button appears to work but the field is empty after refresh, the issue is likely a corrupted local storage entry. Follow Step 1 again and ensure you clear both local storage and site data. After clearing, do not restore any previous session tabs — start fresh by typing the URL manually.
Custom Prompt Saves on One Device but Not Another
This indicates a sync issue. On the device where the prompt saves, go to Settings > Account and check that you are logged into the same account. On the device where it fails, log out, clear cookies, and log back in. The prompt should sync within 30 seconds. If it does not appear, save a new prompt on that device — it will overwrite the old one and sync to all devices.
Save Button Does Nothing or Shows a Loading Spinner Forever
This points to a network or server issue. Check your internet connection by loading another website. If your connection is fine, the Perplexity server may be temporarily down. Wait 15 minutes and try again. If the problem persists, disable any VPN or proxy service that might be routing traffic through a blocked region.
Perplexity Free vs Pro: Custom Prompt Behavior
| Item | Perplexity Free | Perplexity Pro |
|---|---|---|
| Custom prompt storage | Local browser storage only | Cloud sync across all devices |
| Number of custom prompts | 1 | Up to 5 |
| Prompt length limit | 500 characters | 2000 characters |
| Save persistence after cache clear | Lost — must reconfigure | Re-synced from cloud after login |
After following the steps above, your custom prompt should save and persist across browser sessions. If you use Perplexity on multiple devices, consider upgrading to Pro for cloud sync so you never lose your prompt again. As an advanced tip, set your custom prompt to include a specific output format like “Answer in bullet points with sources cited at the end” to reduce manual formatting work.