Tools that just work
A set of handy online tools for PDFs, images and text. Everything runs right in your browser — no file uploads, no sign-up, free.
Image compression
Reduce the file size of a JPG, PNG or WebP image right in your browser.
Image format conversion
Convert an image between JPG, PNG and WebP right in your browser.
Resize image
Change an image's width and height right in your browser.
QR code generator
Create a QR code from a link or text and download it.
Merge PDF
Combine several PDF files into one right in your browser.
Split PDF (pick pages)
Pick specific pages from a PDF and download them as a new file.
Strong password generator
Create a strong random password right in your browser.
Character and word counter
Count characters, words, sentences and paragraphs in your text instantly and for free.
Lorem ipsum generator
Generate Lorem ipsum placeholder text with a chosen number of paragraphs.
Base64 — encode and decode
Encode or decode text to/from Base64.
Rotate PDF
Rotate all pages of a PDF by 90, 180 or 270 degrees and download.
Percentage calculator
Calculate percentages: what is X% of Y, X is what % of Y, percentage change.
UUID generator
Generate random version-4 UUIDs.
Color converter (HEX ↔ RGB)
Convert a color between HEX and RGB with a preview.
JSON formatter and validator
Format and validate JSON (pretty-print) right in your browser.
Why Nástrojárna?
- 🔒 Privacy first. Files are processed on your device and sent nowhere.
- ⚡ Lightning fast. No waiting on a server — you get the result instantly.
- 🆓 Free, no account. Open it, use it, done.