Website: formharvester.com

FormHarvester is an AI-assisted form intelligence engine. It navigates the open web autonomously - executing searches, parsing page structure, extracting contact signals, and interacting with forms at the browser level. Built on async browser with stealth fingerprinting, proxy rotation, and a pluggable captcha solver interface.

How to run

Desktop app

Download formharvester.exe (built automatically on every release by .github/workflows/release-windows-exe.yml), then run it. Everything is configured in the app: no files to edit.

Python

pip install "formharvester[gui]"
formharvester gui      # desktop app
formharvester run      # headless harvest loop

The [gui] extra pulls in pywebview. Plain pip install formharvester gives you the CLI and the library without it.

Configuration

Settings live in formharvester.json, and each campaign (form-fill details plus the search queries) lives in profiles/<name>.json. Run formharvester settings path to see where they are stored. The location is the working directory when a config already exists there, otherwise ~/.formharvester; FORMHARVESTER_HOME overrides both.

Scraped emails, progress files and error logs are written to data/ and log/ inside that same directory.

From the GUI

formharvester gui opens three tabs: Run picks the active campaign and streams the live console, Campaign edits the form-fill details and query list, Settings covers the engine, search pacing and the captcha solver.

From the CLI

formharvester settings show                     # print current settings
formharvester settings set engine.headless true # values are validated
formharvester settings set google.max_pages 5

formharvester profile list
formharvester profile create solar
formharvester profile use solar

formharvester run --profile solar --headless --max-pages 5

formharvester discover "roofing companies austin" > targets.txt

Flags on run override the saved settings for that run only.

Settings reference

Key	Meaning
engine.send_form	Submit the contact form once filled. Disable to save time.
engine.headless	Run the browser hidden.
engine.skip_ads	Skip ad results.
engine.max_time	Seconds allowed per website.
engine.generate_email_sources	Also record the URL each email came from.
engine.debug_form	Fill forms but never submit them.
google.start_page	Results page to start from.
google.max_pages	Result pages to walk per query.
google.min_delay / google.max_delay	Random delay range, in seconds, between searches.
google.captcha_sleep	Minutes to pause after a search captcha. 0 disables.
google.search_timer	Minutes between search batches.
captcha.provider	deathbycaptcha, 2captcha, none, or blank to auto-detect from the credentials you filled in.
captcha.twocaptcha_api_key	2captcha API key.
captcha.dbc_username / captcha.dbc_password	DeathByCaptcha credentials.

Programmatic use (library API)

Since 2.4.0 FormHarvester ships a library API so you can drive the engine from your own code - no settings files or progress files required. The CLI is unchanged.

from formharvester import FormHarvester, FormFillDetails, HarvesterOptions

details = FormFillDetails(
    first_name="Jane", last_name="Doe",
    email="jane@example.com", phone="1234567890",
    subject="Enquiry", message="Hi, I'd like a quote.",
)

with FormHarvester(details, HarvesterOptions(send_form=True, headless=True)) as fh:
    result = fh.harvest("https://acme.com")
    print(result.status, result.submitted, result.emails)

    urls = fh.discover("roofing companies austin")   # search -> site URLs
    for r in fh.harvest_many(urls):
        print(r.url, r.status)

result.status is one of SUBMITTED, FORM_NOT_FOUND, BUTTON_NOT_FOUND, VISITED, or ERROR - the same tokens the CLI writes to its progress file. One-shot helpers harvest_site(url, details) and harvest_sites(urls, details) are also available.

discover() raises CaptchaError rather than blocking; set HarvesterOptions.captcha_sleep to wait it out instead.

Package layout (2.4.1)

src/formharvester/
├── __init__.py          # public API (FormHarvester, FormFillDetails, …)
├── api.py               # library API
├── engine/              # Selenium browser engine + Chrome driver
├── scraper/             # web search + email scraping
├── form_handler/        # contact-page discovery, field fill, submit
├── captcha/             # solver providers (DeathByCaptcha, 2captcha) + detection
├── settings.py          # JSON settings, profiles and file locations
├── cli/                 # typer commands (`formharvester`)
├── gui/                 # pywebview desktop app (web/ holds its HTML, CSS, JS)
└── utils/               # root-domain, email regex, link filters

Building the Windows executable (maintainers)

.github/workflows/release-windows-exe.yml builds formharvester.exe with PyInstaller and attaches it to the GitHub Release for any pushed v* tag (also runnable manually via workflow_dispatch). To build it locally:

uv sync --no-group dev --extra gui
uv pip install pyinstaller
uv run pyinstaller packaging/formharvester.spec

The executable launches the desktop app. The formharvester command installed by pip is the CLI.

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This project is released under the MIT License. You are free to use, modify, and distribute this software, provided that the original copyright notice and license terms are included in all copies or substantial portions of the software.