Sign, fill & redact PDFs without uploading them.
Free, no sign-up — and you can prove it: open DevTools and watch nothing upload. Most browser PDF tools send your whole file to a server (some even charge to download it back). AttachKit runs entirely on your device, and its AI features send only the text they need — never the file.
- Editing runs in your browser — no upload
- No account to start
- Standalone verifier — checkable offline
- Unlimited fill, redact & convert — free
Built forsolo lawyersaccountantsimmigrants— sensitive client & gov forms, never uploaded
No upload. No account. No credit card.Unlimited form-filling + 10 free signed PDFs/mo.126 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.
The PDF jobs people do most — done right.
Auto-fill, signing, and redaction lead the way — plus a private AI agent that does it all from a plain-English request — backed by a full browser-side toolkit: convert, compress, merge, OCR, and more. The work runs on your device, not our servers; the only upload is when you ask us to send a document to someone else to sign.
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 →On-Device Redact
Find and black out SSNs, addresses and account numbers with a model that runs in your browser — nothing uploaded, not even the text. Strips hidden metadata too, and a cloud scan is there if you want it.
Try it →Private PDF Agent
Tell your PDF what to do in plain English. The agent proposes a plan you approve before anything changes — file never uploaded, only extracted text sent to AI.
Try it →Tell your PDF what to do.
The only AI PDF agent that shows you a plan to approve before anything changes — and where the file never leaves your browser. Only the extracted text is sent to AI, never the document.
- Step 1
Tell it
Describe the change in plain English — “redact every SSN”, “delete the blank pages”, “fill this from my profile”.
- Step 2
Review the plan
The agent proposes an ordered, labeled list of every change. Nothing happens to your PDF until you approve it.
- Step 3
Apply & export
Approve and it runs — locally, on your device. Your original is never modified until you export the result.
Don't take our word for it: open your browser's DevTools → Network while you work. You'll see the extracted text go to AI — and the PDF itself never upload.
Every PDF tool, 100% in your browser
Sign, fill, edit, convert, redact and organize — 31 tools, all running on your device. Your PDFs never leave it.
Sign & verify
Edit
Organize
Convert
Your documents stay on your device.
Every PDF you open is filled, signed, and redacted inside your browser — we don't store, transmit, or even see your files. The exceptions are Sign's two handoffs — sending a document out for signature, and the QR code to your phone: each uploads a copy, encrypted in your browser, and we hold the ciphertext for 7 days. Turn on the audit trail when you sign and your signature becomes provable by anyone, offline — checkable on any device, free, with no account and no call home (most e-sign tools lock verification inside their own platform).
Filling, signing, and redaction run entirely in your browser. Open the DevTools Network tab and watch — no upload. The exceptions are Sign's two handoffs — sending for signature, and the QR code to your phone — which upload an encrypted copy so the other device can open it.
Turn on the audit trail and your signature is timestamped and tamper-evident; on Max it's also passkey-backed. Then anyone can verify the 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.
The difference is where your file goes.
Most PDF tools have to move your document to do their job — AttachKit doesn’t move it at all.
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 & redact
- 10 signed PDFs per month (with a small “Signed with AttachKit” footer)
- 5 edited PDFs per month
- 10 AI actions per month
- Saved profile for one-click autofill
No credit card. No account required.
Pro
per month — or $120/year ($10/mo, 2 months free)
- 200 AI actions per month
- 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)
Cancel any time. No questions, no calls.
Need notarization, long-term verifiable archives, or collecting verified signatures from clients? See the Max tier →
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