Tools that never leave home.
Pencilbox is a small workshop of file utilities that run entirely in your browser. Nothing you open is sent anywhere. No signup, no watermark, no size limit. Free.
The toolshed
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Trimline
PDF editor
Edit, sign, redact, OCR, compare, compress, merge, split PDFs — all in your browser.
Open Trimline
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Image compressor
shrink images
Shrink JPGs and PNGs without visible quality loss. Batch a whole folder at once.
Open compressor
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Image converter
change formats
Turn any JPG, PNG, or WebP into any other format. Preserve or strip metadata.
Open converter
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QR generator
make QR codes
Make QR codes for links, wifi credentials, contact cards, or plain text.
Open QR generator
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Video trimmer
cut and clip video
Trim video clips without uploading them anywhere. Outputs WebM at real-time speed.
Open trimmer
Why local?
Most file tools online work by uploading your files to their servers, running the job there, and giving you back a download. Your document sits on someone else's disk for as long as their retention policy says — for a compressor or converter, that can be days.
Pencilbox skips that step entirely. The tools run inside the browser tab you're reading this in. Your files never leave your device because there's nowhere to send them.