Free tools that just work.
Fast, simple utilities for converting, calculating, formatting, generating, and creating — directly in your browser. No signup. No uploads. No tracking.
Popular tools
JSON Formatter
Format, beautify, and validate JSON with adjustable indentation — instantly in your browser.
UUID Generator
Generate cryptographically random UUID v4 identifiers, one or a thousand at a time.
Base64 Encoder
Encode any text — including emoji and non-Latin scripts — into standard Base64.
JWT Decoder
Decode a JWT’s header and payload and check its expiration — without sending it anywhere.
Word Counter
Count words, characters, sentences, and paragraphs in your text instantly.
Percentage Calculator
Three percentage tools in one: percent of a value, ratio as a percent, and percent change.
Age Calculator
Find the exact age in years, months, and days — plus totals and the countdown to the next birthday.
Compound Interest Calculator
Project savings growth with compound interest and monthly contributions, year by year.
Color Picker
Pick any color and copy it as HEX, RGB, or HSL.
Contrast Checker
Check text/background color pairs against WCAG AA and AAA contrast requirements.
JPG to PNG
Convert JPG images to lossless PNG — entirely in your browser.
Image Compressor
Shrink image file size with quality and format control, and see the savings before you download.
JPG to PDF
Combine JPG and PNG images into a single PDF, one page per image.
PDF Merge
Combine multiple PDFs into one, in the order you choose.
Browse by category
Developer Tools
9 toolsFormat, validate, decode, and generate the things developers deal with every day.
Text Tools
5 toolsCount, convert, compare, and clean up text instantly.
Calculators
4 toolsQuick, accurate calculators for percentages, dates, ages, and finance.
Color Tools
4 toolsPick colors, convert formats, and check accessibility.
Image Tools
8 toolsConvert, compress, and resize images without uploading them.
PDF Tools
5 toolsMerge, split, and convert PDFs locally in your browser.
Why Uttir?
Private by design
Your files and text are processed locally in your browser and never uploaded to a server.
Fast and free
No signup, no paywalls, no waiting. Tools load instantly and stay responsive.
Simple
Each tool solves one problem well, with a clean interface that gets out of your way.