Fill Any Web Form in Seconds.
Powered by Your Own AI.
Paste any resume, bio, or checkout info. FastFiller reads the form, maps every field with AI, lets you preview values, and fills the form instantly. Zero subscriptions. Zero tracking.
See How FastFiller Works in Real Time
Click below to simulate the Pre-Fill Dry-Run and test 1-Click Time Machine Undo right on this page.
Candidate Application
Target web form with inputs, radios, searchable multi-select & checkboxes
FastFillerPOPUP
Zero Middleman Servers.
Zero Stored Logs.
When you use other autofill extensions like Fill Hero or Simplify, your resume, phone number, and form answers are routed through their proprietary cloud proxy servers.
FastFiller has no server. Your data stays inside your browser's encrypted local storage. When you click fill, the extension communicates directly with your chosen AI engine (OpenAI, Google, Anthropic, or local offline Ollama).
Data Exposure: Your resume, PII, and form fields are intercepted and logged on their cloud backend.
Zero Middleman: Zero proxy servers, zero cloud logging, zero tracking telemetry. Complete privacy by design.
Universal Model Gateway & Zero-Key Web Sessions
Competitors lock you into their single proprietary backend. FastFiller gives you instant free fills via your active browser tabs, lets you discover 100+ live models, or connect any custom OpenAI-compatible endpoint.
Universal OpenAI-Compatible Gateway & Live Model Explorer
โกDay-0 Support for Newly Released Models
When providers release new models (like Google's Gemini 3.5 Flash Lite or DeepSeek's DeepSeek V4 Flash / V4 Pro), you don't wait for extension updates. Just click Fetch Models and use them on day one.
๐ฏ1-Click "Free Only" Model Filtering
OpenRouter and Google AI Studio host generous completely free models. FastFiller dynamically checks $0.00 pricing tiers and filters them into one convenient single-click list.
๐Your Keys Never Touch Our Servers
Zero proxy servers. All BYOK calls route directly from your local browser extension to the provider endpoint. Zero tracking, zero middleman data storage.
Advanced Capabilities That Set FastFiller Apart
Standard autofill tools fail when confronted with React comboboxes, Shadow DOMs, and datepickers. FastFiller was built from the ground up to conquer them.
Pre-Fill Dry-Run & Trust Inspector
Never worry about AI hallucinating or overwriting sensitive fields blindly. FastFiller opens a clean inspect modal showing exactly what value is proposed for every field, allowing you to uncheck or edit values before injecting.
Time-Machine 1-Click Undo
Changed your mind? Click one button and FastFiller completely reverts inputs, dropdowns, radios, and React-Select chips to their exact previous state.
Deep Shadow DOM Penetration
Recursively traverses open and closed shadow roots used by modern Web Components, Salesforce LWC, and Google Forms.
Smart Datepicker & Mask Stripping
Automatically parses European (DD/MM/YYYY) and US dates, clamps masked phone numbers, and dismisses calendar popup overlays.
Bilingual & Cascading Dropdowns
Handles bilingual slash dropdowns (e.g. "ARA / เคเคฐเคพ"), country codes (+91, +1), and dynamic async cascading selects (State โ City).
How FastFiller Works
Three clean steps to eliminate manual form entry forever.
Open on Any Web Form
Press Alt+Shift+F or click the FastFiller icon. Select your profile or paste any raw text.
Preview with Dry-Run
The AI maps every field contextually. Review proposed values in the interactive inspector before anything is injected.
Done โ With 1-Click Undo
The entire form is populated in milliseconds. Submit with confidence or hit 1-Click Undo if you want to make changes.
Autofill Every Modern Form & ATS Portal
Built from the ground up to conquer complex accordions, React comboboxes, and multi-step surveys that break conventional autofill extensions.
Workday
Auto-maps work history accordions and nested education dates.
Greenhouse
Solves custom demographic radios and resume text blocks.
Google Forms
Penetrates ARIA checkbox matrices and multi-step quizzes.
LinkedIn Jobs
Handles screening assessments and external portal redirects.
Lever ATS
Fills single-page salary, visa status, and cover letter fields.
Ashby
Dispatches React synthetic events for combobox chips.
CRM Data Entry
Pasty raw notes into HubSpot, Salesforce, or Zoho fields.
Checkout Forms
Instant shipping and address fills without storing card numbers.
Exam Forms & Student Applications
Reuses student, parents, address & marks data before slow portals crash.
Salesforce LWC Forms
Penetrates Shadow DOM boundaries and triggers Lightning events.
Oracle Taleo
Fills multi-page corporate portals and ASP.NET table inputs.
Handshake
Fills university internships, major, GPA, and graduation years.
FastFiller vs Other Autofill Tools
Stop paying \$80+ a year for basic scripts with artificial limits. Here is how FastFiller gives you more power, total privacy, and zero subscriptions.
| Feature / Dimension | โก FastFiller | Fill Hero | Simplify | Chrome Autofill |
|---|---|---|---|---|
| Monthly Pricing Cost for heavy users & job hunters | $0.00 Forever | $7.99 / month | Free (Basic) / $39.99/mo (Simplify+) | Free |
| Free Tier Allowance Forms you can fill without paying | Unlimited Free Fills (Universal) | 30 fills / month cap | Unlimited (Job Portals Only) | Unlimited (static) |
| Privacy & Cloud Servers Where your resume & form data travels | 0 Middleman Servers (Direct) | Processed via cloud proxy | Synced to cloud database | Local browser only |
| Pre-Fill Dry-Run Review Inspect values before anything is typed | โ Yes (Full Inspector Modal) | โ No (Blind injection) | โณ Partial | โ No |
| 1-Click Time-Machine Undo Instant complete rollback of form fields | โ Yes (1-Click Restore) | โ No | โ No | โ No |
| Multi-Model Intelligence Choice between AI engines | โ 10+ Models (Claude, Gemini, Groq) | โ Locked to 1 model | โ Locked to 1 model | โ No AI intelligence |
| 100% Offline Local LLMs Runs completely offline via Ollama | โ Yes (Air-gapped security) | โ No | โ No | โ No |
| Shadow DOM & React-Select Works on modern enterprise SPAs | โ Full Penetration | โณ Limited | โณ Limited | โ Frequently fails |
Everything You Need to Know
Clear, honest answers about FastFiller's technology and privacy.
Do I need to pay or buy an API key to use FastFiller? โผ
No! FastFiller connects directly to your existing, free ChatGPT or DeepSeek web sessions in Chrome. Using our automated Sentinel PoW engine, you get unlimited 100% free fills with zero API keys or monthly subscriptions.
How is FastFiller more private than other autofill extensions? โผ
Most commercial autofill extensions route your resume, phone number, and form fields to their proprietary cloud servers. FastFiller has ZERO middleman servers. Everything runs 100% inside your browser extension, communicating directly and encrypted with your chosen AI provider or local offline Ollama.
What is Dry-Run mode and why does it matter? โผ
Unlike traditional tools that blindly overwrite web forms, FastFiller's Pre-Fill Dry-Run opens a clear preview modal showing every proposed field value. You can inspect values, uncheck fields you do not want filled, and confirm before anything touches the page.
Does FastFiller work on complex forms like Workday, Google Forms, and React apps? โผ
Yes. FastFiller includes deep Shadow DOM traversal, React-Select combobox manipulation, ARIA checkbox matching, and automatic multi-language dropdown matching (e.g. English and regional formats).
Can I run FastFiller completely offline? โผ
Yes! FastFiller supports Local Ollama (Llama 3, Mistral, Qwen). When using Ollama, zero network bytes leave your computer, making it suitable for confidential corporate or government environments.
Stop Filling Forms Manually.
Install the free extension. Connect your ChatGPT/DeepSeek tab or plug in your favourite model. Experience the fastest autofill on the web.