Free developer tools that run in your browser
QR codes, passwords, UUIDs, JSON, Base64 and more — no sign-up, and nothing is ever sent to a server.
Generate
QR Code Generator
Create a downloadable QR code for any link or text.
Open toolPassword Generator
Generate strong, random passwords with custom rules.
Open toolUUID Generator
Generate random v4 UUIDs, one or many at a time.
Open toolLorem Ipsum Generator
Create placeholder paragraphs, sentences or words.
Open toolConvert & Encode
Base64 Encode / Decode
Encode text to Base64 or decode it back to plain text.
Open toolURL Encode / Decode
Percent-encode text for URLs, or decode it back.
Open toolHEX to RGB Converter
Convert colours between HEX, RGB and HSL.
Open toolCase Converter
Change text between UPPER, lower, Title and more.
Open toolBy Mana Studio
Need this built into your own product?
We build web apps, APIs and integrations for startups and businesses — the same team that ships these free developer tools.
Adding AI to an existing product — retrieval over your own data, an agent, a chatbot — is its own build. See AI development.
Two separate price lists — see every price we charge.
9 free developer tools — all processed privately in your browser.