For recruiters, SDRs, finance & ops teams — anyone who gets files from strangers

Never open a stranger's
attachment again.
Preview it as a safe, living link.

Drag any file — PDF, deck, spreadsheet, doc — and get an instant sandboxed preview in the browser. No download to your device, no macros ever execute, and boring files render beautiful. The link is the preview; the file never touches your machine.

Get early access — free Try the previewer ↓

Free to start · Pro is 14-day refund · vlad@belkins.io

Built by Vlad Podolyako — from the lab behind the html-first playbook. I run Folderly (B2B email deliverability) and Belkins. One of a fresh wave of portfolio bets shipping May 2026. Free to try, replied personally.

Free preview · drop a file

Drop a file.
Watch it become a safe link.

Drag a file into the box below — or click a sample. We run a quick sandbox scan, then render it beautiful in your browser. Nothing downloads, nothing executes.

40+ file types at launch — each rendered in a sandbox that can't execute anything · macros stripped on every preview

◎ Drop a file · sandboxed preview

File stays in your browser — nothing uploads, nothing runs. Pick a sample to see exactly what your recipient sees.

⬆

Drag a file here
— or try a sample

PDF · Word · Excel · CSV · images — up to 25 MB

Sandboxing

Drop a file above (or pick a sample) to see the safe preview.

◎ This is what your recipient sees — a link, not a download. Real PeekSafe will render 40+ file types this way at launch, in a sandbox that can't run anything.

Why bother

Three reasons it's safer than opening it.

Files that touch your device

The file renders in an isolated sandbox on our side. You see a link, not a download. Macros, embedded scripts, and auto-open payloads never reach your machine.

40+

File types rendered beautiful

PDF, PPTX, XLSX, DOCX, CSV, and more — re-rendered as clean, readable HTML. An ugly spreadsheet from a stranger becomes a tidy preview you can skim in two seconds.

Link you can forward safely

Send the preview link to a teammate instead of the raw file. They peek, they decide, nobody plays attachment roulette. Pro links are private and branded.

How it works

Three moves. Zero downloads.

◎ STEP 01

Drop the file

Drag it onto PeekSafe — or paste a link to one. The file goes into an isolated sandbox, never to your device.

◎ STEP 02

We render it safe

Macros and scripts are stripped. The content is re-rendered as clean HTML — readable, searchable, and impossible to execute anything.

◎ STEP 03

Peek, then decide

Read it as a link in your browser. Forward the link to a teammate, or open the real file later — now that you know it's not a trap.

Pricing

Free to peek. $9 to scale.

Free

$0/month

The previewer · 10 previews/mo

Sandboxed preview · 40+ file types at launch
10 previews per month
No download, no macro execution
Shareable preview link

Get early access — free

Pro · $9/mo

$9/month

For people who get files all day

Unlimited previews
Private & branded share links
Team inbox — forward files in
14-day refund

Start Pro — $9/mo →

Straight up

FAQ

The honest answers.

Is the file actually safe to view?

Yes. The file is opened in an isolated sandbox on our side, never on your device. Macros, embedded scripts, and auto-open payloads are stripped before anything renders. You see a re-rendered HTML preview — there's nothing live to execute.

What file types do you support?

40+ at launch — PDF, PPTX, XLSX, DOCX, CSV, ODT/ODS, RTF, and common image formats. If a type isn't supported yet, you'll see a clear message rather than a risky fallback.

Do you store my files?

Free previews are processed and discarded. Pro share links are stored only as long as the link is live, and you can revoke any link instantly. We never keep originals longer than you ask.

What's the difference between Free and Pro?

Free gives you 10 sandboxed previews a month — enough to vet the occasional sketchy attachment. Pro ($9/mo) is unlimited, with private & branded share links and a team inbox you can forward files into. Pro is 14-day refund.

Who is this actually for?

Anyone who gets files from people they don't fully trust: recruiters opening resumes, SDRs opening prospect decks, finance & ops teams opening vendor invoices. If "should I open this?" is a daily question, PeekSafe is the answer.

Stop playing attachment roulette.
Just peek first.

Free to start — 10 sandboxed previews a month, no card. Get on the early-access list and you'll be among the first to drop a file and watch it render safe.