Merge PDF
Combine several PDF files into one, in the order you choose.
PDF
Free · Open source · Private by design
Tools that never see your data.
71+ everyday tools for developers, designers and everyone else: format JSON, merge PDFs, compress images, generate passwords. All running privately in your browser.
Popular tools
The ones people reach for every day.
Image Compressor
Shrink JPG, PNG and WebP images without uploading them anywhere.
Image
JSON Formatter & Validator
Format, validate, minify and repair JSON with exact error positions.
Developer
QR Code Generator
Free QR codes for links, Wi-Fi, contacts and more. They never expire.
Color & design
Password & Passphrase Generator
Strong random passwords and memorable passphrases, made locally.
Generators
Text Diff Checker
Compare two texts and see exactly what changed.
Text
Unit Converter
Length, weight, temperature, volume, speed, data size and more.
Calculators
JWT Decoder
Decode and inspect JSON Web Tokens, and verify HMAC signatures.
Developer
Image Converter
Convert between JPG, PNG, WebP and AVIF in your browser.
Image
Word & Character Counter
Count words, characters, sentences and reading time as you type.
Text
Hash Generator
MD5, SHA-1, SHA-256, SHA-512, CRC-32 and HMAC for text or files.
Encoders & hashes
Unix Timestamp Converter
Convert Unix timestamps to dates and back, in any time zone.
Developer
Browse by category
- Text10Count, clean, compare and transform text.
- Developer14Format, decode, test and inspect code and data.
- Data converters4Convert between JSON, YAML, CSV and more.
- Encoders & hashes8Base64, URL encoding, hashes and escapes.
- Image7Compress, convert, resize and clean up images.
- PDF9Merge, split, rotate and edit PDF files.
- Color & design5Colors, contrast, palettes and QR codes.
- Generators3Passwords, unique IDs and placeholder text.
- Calculators11Units, dates, percentages, loans and more.
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Every tool runs inside your browser. Files, text and passwords are processed locally and never uploaded. Our page can't even connect to other servers.
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The whole project is public under the MIT license. Read the code, check how a tool works, fix a bug or add the tool you wish existed.
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