Help Center
Get set up in minutes
Install the extension, then connect your own AI provider. Pick a provider below for step-by-step instructions with direct links.
Your API keys are encrypted — even we can’t read them
When you paste an API key, it is encrypted at rest inside our Supabase database using pgcrypto with a server-side encryption key. The plaintext is never logged, never returned to the browser, and not visible to PulseWrite staff — the same way a site stores your password as a one-way value. Rewrites still work because the key is only decrypted in-memory during your request, then discarded.
- Encrypted at rest with pgcrypto
- Decrypted only for your request
- Never returned to the browser
- Delete anytime from your dashboard
1. Install the extension
PulseWrite is a Chrome extension that works in Chrome, Edge, Brave and Arc.
- 1Download the ZIP
From the Download page, click ‘Download PulseWrite’.
- 2Unzip the file
Double-click the .zip to extract the PulseWrite folder.
- 3Open chrome://extensions
Paste chrome://extensions in your address bar.
- 4Enable Developer mode
Toggle the switch in the top-right.
- 5Load unpacked
Click ‘Load unpacked’ and pick the unzipped folder.
2. Compare AI providers
All five providers do rewriting and translation. The differences are price, free tier, and writing style. Estimates below assume a typical paragraph rewrite (≈ 400 input + 400 output tokens) — translation costs are very similar.
Gemini 2.0 Flash — up to 1,500 free rewrites per day, no card required.
DeepSeek V3 — about 1,800 rewrites per $1.
Claude 3.5 Haiku — best for emails, cover letters, polished writing.
| Provider | Free tier | Input / output ($/1M tok) | Cost / rewrite | Rewrites per $1 | Speed | Best for |
|---|---|---|---|---|---|---|
| Google Gemini Gemini 2.0 Flash | Yes — generous free quota ≈ 15 rewrites / minute, up to 1,500 / day on the free tier (Gemini 2.0 Flash, AI Studio key, no billing attached). | $0.075 / $0.30 | ≈ $0.00015 (1/100¢) | ≈ 6,500+ | Very fast | Strong on multilingual rewriting and translation — Google's translation lineage shows. Use it for: Everyday rewrites, translation to/from non-English languages, anyone who wants real free usage. |
| DeepSeek deepseek-chat (V3) | No free tier, but $2 lasts a long time None — minimum top-up is ~$2, which covers thousands of rewrites. | $0.27 / $1.10 | ≈ $0.0005 | ≈ 1,800 | Standard | Surprisingly close to GPT-4o on rewriting tasks at a fraction of the price. Use it for: Cost-conscious heavy users who still want near-frontier quality. |
| OpenAI (ChatGPT) GPT-4o mini | No None — requires a prepaid balance ($5 minimum top-up). | $0.15 / $0.60 | ≈ $0.0003 | ≈ 3,300 | Fast | The most predictable rewriter — keeps tone and intent very faithfully. Use it for: Professional writing where consistency matters more than the absolute cheapest price. |
| Anthropic (Claude) Claude 3.5 Haiku | Trial credits only $5 trial credit after phone verification (≈ 1,200 Haiku rewrites). After that, prepaid. | $0.80 / $4.00 | ≈ $0.0019 | ≈ 520 | Fast | The most natural-sounding rewrites — best at long-form prose, emails, and tone-matching. Use it for: Quality-first writing: cover letters, sales emails, polished blog posts. |
| OpenRouter Your pick (200+ models) | Yes — :free models Several :free Llama and Gemma models with strict rate limits (≈ 20 requests/minute). | Pass-through + ~5% / Pass-through + ~5% | Depends on chosen model | Depends on chosen model | Fast | Switch between GPT, Claude, Gemini, Llama, Mistral, DeepSeek from one key. Use it for: Power users who want to A/B different models without juggling accounts. |
Prices are public list prices for each provider's recommended rewriting model as of 2025. Your actual bill is what the provider charges you — PulseWrite never adds a markup on your API usage.
3. Add your AI provider key
Choose your provider for a guided walkthrough. Bring-your-own-key is available on Pro and Lifetime plans.
OpenAI powers ChatGPT. Use your own key to run rewrites on GPT models with no platform credits charged.
sk-proj-… or sk-… (51+ chars)
Anthropic builds the Claude family of models — great for natural, nuanced rewriting.
sk-ant-api03-… (108 chars)
Google’s Gemini models — fast, multilingual, and the cheapest tier offers a generous free quota.
AIzaSy… (39 chars)
DeepSeek offers very low-cost, high-quality models — one of the cheapest paid options.
sk-… (35 chars)
OpenRouter is a meta-provider: one key lets you call GPT, Claude, Gemini, Llama, and 200+ other models with a single bill.
sk-or-v1-… (73 chars)
Still stuck?
Email us at support@pulsewrite.app and we’ll walk you through it.
Frequently asked questions
Which AI provider should I pick?
Start with Google Gemini — it has a generous free tier (up to 1,500 rewrites/day on Gemini 2.0 Flash) and excellent multilingual translation. If you write a lot in English and want the most natural prose, use Claude 3.5 Haiku. If you're cost-obsessed and rewrite all day, DeepSeek V3 is ~1,800 rewrites per $1. OpenAI GPT-4o mini is the safest middle ground, and OpenRouter lets you try any of them from a single key.
Which provider is free?
Only Google Gemini offers an ongoing free tier (≈ 15 rewrites/minute, up to 1,500/day) — no card required. OpenRouter has a handful of ':free' Llama and Gemma models with strict limits. Anthropic gives a small one-time trial credit. OpenAI and DeepSeek are pay-as-you-go from the first request.
How many rewrites do I get per dollar?
Rough numbers for a typical paragraph rewrite (≈ 400 in / 400 out): Gemini Flash ~6,500/$1, DeepSeek V3 ~1,800/$1, GPT-4o mini ~3,300/$1, Claude 3.5 Haiku ~520/$1. Translation is similar. Long documents proportionally cost more.
Does translating cost the same as rewriting?
Almost — translation uses roughly the same input and output token count as a rewrite of the same length, so per-call cost is comparable. Translating to/from non-English languages may use a few more tokens because non-Latin scripts encode less densely.
Is PulseWrite free?
Yes — the Chrome extension is free and includes a built-in AI tier that uses our platform credits. Bring-your-own-key (OpenAI, Claude, Gemini, DeepSeek, OpenRouter, custom) is available on the Pro and Lifetime plans so you pay your provider directly.
Which browsers are supported?
Any Chromium-based browser: Chrome, Edge, Brave, Arc, Opera and Vivaldi. Firefox and Safari are not supported yet.
Can PulseWrite read my API key?
No. Your API key is encrypted at rest with pgcrypto using a server-side encryption key the moment you save it. The plaintext is never logged, never returned to the browser, and not visible to PulseWrite staff — exactly like a hashed password. It is only decrypted in-memory for the duration of your rewrite request.
Where do rewrites happen — locally or on your server?
Rewrites run on our server so we can decrypt your key and call the provider securely. We don't store the prompt or the rewritten text after the response is returned.
What happens to my key if I cancel my plan?
You can delete it any time from the dashboard, and it is removed from our database immediately. Cancelling your plan also disables key-based rewrites until you renew.
Does PulseWrite work offline?
No — every rewrite calls a hosted AI provider, so an internet connection is required. The only exception is if you point Custom (OpenAI-compatible) at a local model like Ollama running on your own machine.