Free online toolkit · runs in your browser

Free online tools.
Zero uploads.

Compress images, merge PDFs, format JSON and generate passwords on your own device. Your files never touch a server, and there's nothing to sign up for.

Browse all toolsor press / to search

tools live: 20
on the roadmap: 97
uploaded: 0 B
sign-ups: 0

The toolbox

12 drawers, 97 tools

20 tools work today. The dashed ones are on the way. Open a drawer to see everything inside.

TXT

Text Tools

9 toolsCount, convert and clean up text.

Remove Duplicate Lines
Text Diff
Lorem Ipsum Generator
Find & Replace
Text to Slug
Reverse / Sort / Shuffle
Bijoy ↔ Unicode

All text tools →

DEV

Developer Tools

12 toolsFormat, encode and decode data.

JSON ↔ CSV / YAML / XML
HTML / CSS / JS Minifier
Regex Tester
JWT Decoder
Cron Parser
Timestamp Converter
SQL Formatter
Markdown Previewer
HTML Playground

All developer tools →

IMG

Image Tools

11 toolsCompress, resize and convert images.

Image Cropper
Background Remover
Image to Base64
Image Watermark
Meme Generator
EXIF Viewer / Remover
Favicon Generator
Batch Images + ZIP

All image tools →

PDF

PDF Tools

10 toolsMerge, split and create PDF files.

PDF to Image
Rotate / Reorder Pages
Page Numbers & Watermark
Sign PDF
Protect / Unlock PDF
Compress PDF
PDF OCR

All pdf tools →

CNV

Converters

7 toolsUnits, numbers and formats.

Currency Converter
Number Base Converter
Roman Numerals
Time Zone Converter
Calendar Converter

All converters →

CALC

Calculators

9 toolsEveryday math made simple.

BMI / BMR / Calorie
Loan / EMI Calculator
GPA / CGPA Calculator
Discount / VAT / Tax
Scientific Calculator
Date Difference
Zakat Calculator

All calculators →

SEO

SEO Tools

5 toolsMeta tags, robots.txt and sitemaps.

Meta Tag Generator
Robots.txt Generator
Keyword Density
Open Graph Preview
Sitemap Generator

GEN

Generators

9 toolsPasswords, QR codes, IDs and more.

QR / Barcode Scanner
Barcode Generator
Random Picker
Fake Data Generator
Business Name Generator
Invoice Generator

All generators →

CLR

Color & Design

8 toolsColors, palettes and CSS helpers.

Color Converter

Palette Generator
Image Color Extractor
Gradient Generator
Contrast Checker
Box Shadow / Radius
Font Preview
SVG Optimizer

All color & design →

SEC

Security Tools

5 toolsHashes, encryption and checks.

Hash Generator

Bcrypt Generator
AES Encrypt / Decrypt
Password Strength
HMAC Generator

All security tools →

A/V

Audio & Video

7 toolsConvert, trim and record media.

Video to MP3
Video Compressor
Video Trimmer
GIF Maker
Audio Cutter
Voice / Screen Recorder
Text to Speech

NET

Network Tools

5 toolsIP, DNS and domain lookups.

What Is My IP
IP Geolocation
DNS Lookup
WHOIS Lookup
User Agent Parser

Ready now

Every tool that works today

DEVJSON Formatter & ValidatorBeautify, minify and validate JSON with error line numbers.DEVBase64 Encode & DecodeEncode text or files to Base64 and decode it back.DEVURL Encode & DecodePercent-encode text for URLs or decode encoded URLs.TXTWord CounterCount words, characters, sentences and reading time.TXTCase ConverterUPPER, lower, Title, camelCase, snake_case and more.GENPassword GeneratorStrong random passwords using your browser's secure RNG.GENQR Code GeneratorQR codes for links, text and Wi-Fi. PNG and SVG download.GENUUID / ULID GeneratorBulk-generate UUID v4, UUID v7 and ULID identifiers.IMGImage CompressorShrink JPG, PNG and WebP files without uploading them.IMGImage ResizerResize images by pixels or percentage.IMGImage ConverterConvert between PNG, JPG and WebP in bulk.PDFMerge PDFCombine multiple PDFs into one, in any order.PDFSplit PDFExtract pages or split a PDF into several files.PDFImage to PDFTurn JPG, PNG and WebP images into a PDF.CALCAge CalculatorExact age in years, months and days, plus next birthday.CALCPercentage CalculatorPercent of, percent change, increase and decrease.CNVUnit ConverterLength, weight, temperature, area, volume, speed and data.CNVNumber to WordsSpell out numbers in words, including currency and checks.CLRColor ConverterHEX, RGB, HSL, OKLCH and CMYK in one place.SECHash GeneratorMD5, SHA-1, SHA-256, SHA-512 for text and files.

Privacy by design

Your files stay on your device

Most tool sites upload your file, process it on their server and send it back. Mavros sends the tool to you instead.

1Pick a fileDrop it, browse for it or paste it with Ctrl+V.
2Your browser does the workCanvas, WebAssembly and Web Workers process it locally, even offline.
3Save the resultThe file goes straight to your downloads. Close the tab and it's gone.

ElementsConsoleNetwork

Name	Type	Method	Size
image-compressor/	document	GET	14.2 KB
app.js	script	GET	48.6 KB
image-compressor.js	script	GET	9.8 KB
bricolage.woff2	font	GET	31.0 KB
blob:photo-compressed	blob (local)	—	612 KB

Compressing a photo: 5 requestsUploaded: 0 B

Free online tools.Zero uploads.