StackTools
Private PDF and image tools that never leave your browser
StackTools launched on August 24, 2026 with 1 votes, #11,494 of 23,274 launches that month.
What it does
A free, private alternative to upload-based PDF and image suites. StackPDF: 34 tools to merge, split, compress, convert, OCR, redact, sign, and protect PDFs. StackImage: 18 tools to compress, convert (including HEIC), crop, remove backgrounds, and upscale - all in the browser. No account. Files never leave your device.
StackTools is a family of free, privacy-first apps that run entirely in your browser. StackPDF and StackImage process files on your device — no account, no uploads.
Private browser tools for everyday work . A growing suite of free apps for PDF and images — built so work never requires giving up your documents. Each product is a focused toolkit. Same privacy promise across the family. Merge, split, compress, convert, OCR, redact, and more — free PDF tools that process files on your device. No account. No uploads. Compress, convert, crop, and enhance images privately in your browser — including HEIC convert, background removal, and on-device upscale. No account. No uploads. Files are processed in your browser. Nothing is uploaded to our servers. Open a tool and get to work — no signup, no credit card, no friction. After the first visit, many tools keep…from stacktools.studio
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