Your PDFs never leave your browser.
Sign, fill, and redact — locally.
Most browser PDF tools upload your whole file — some even charge to download it back. AttachKit does it all in your browser; its AI features send only the text they need, never the file. Open DevTools and watch nothing leave.
No upload. No account. No credit card.Unlimited form-filling + 15 free signed PDFs/mo.39 gov + legal forms — the common ones pre-mapped for one-click (W-9, Lease, NDA, …)Post-quantum signatures + notary attestation on Max
Drop a PDF — it stays in your browser. Open the Network tab if you don't believe us.
Goes straight into /app/sign — no signup, no upload.
Built privacy-first. Open architecture. 39+ gov & legal forms — the common ones pre-mapped for one-click, including:
The PDF jobs people do most — done right.
Auto-fill, signing, and redaction lead the way — backed by a full browser-side toolkit: convert, compress, merge, OCR, and more. Every job runs on your device; nothing is uploaded.
AI Auto-Fill
Drop a fillable PDF form. AttachKit maps your saved profile to its fields and fills what it can — a W-9 in seconds, every value yours to review.
Try it →One-Click Sign
Sign yourself or send to others. Recipients sign without an account. Optionally append an audit trail: timestamp, time zone, and device details.
Try it →AI Redact
Click once. AttachKit finds and blacks out SSNs, addresses, and account numbers, then strips hidden metadata — all in your browser, nothing uploaded.
Try it →Your documents never touch our servers.
Every PDF you open is filled, signed, and redacted inside your browser — we don't store, transmit, or even see your files. And every signature stays provable by anyone, offline: most e-sign tools lock verification inside their own platform; an AttachKit signature stays checkable on any device, free.
Filling, signing, and redaction run entirely in your browser. Open the DevTools Network tab and watch — the PDF never uploads.
Every signature is timestamped and tamper-evident; on Max, signatures are also passkey-backed. Anyone can verify a signed PDF with no account and no call home.
Max adds post-quantum signatures, a self-declared notary attestation, and PAdES-aligned archives (strict PAdES-B-LTA on the roadmap) — built to stay verifiable even if AttachKit is gone.
Questions, answered.
Simple pricing.
Free for occasional use. Pro for daily PDF work. No teams, no seats, no contract calls. Cancel any time.
Free
forever
- Unlimited fill, edit & redact
- 15 signed PDFs per month
- 25 AI actions per month
- Saved profile for one-click autofill
- ‘Signed via AttachKit’ footer
No credit card. No account required.
Pro
per month — or $120/year ($10/mo, 2 months free)
- Sign as many PDFs as you want
- Remove the AttachKit watermark
- Bulk send to up to 50 recipients
- Bulk-fill forms from a CSV (mail-merge)
- Start on desktop, sign on your phone
Cancel any time. No questions, no calls.
Need notarization, long-term verifiable archives, or signing on a client's behalf? See the Max tier →
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