SwissKnife
One toolbox for the little jobs that waste your day. Compress an image, make a QR code, clean up JSON — done in seconds. Everything runs in your browser: your files never leave your device.
Image Compressor
Shrink JPG/PNG/WebP file size without killing quality.
Open →Image Converter
Convert between PNG, JPG and WebP instantly.
Open →Image Resizer
Resize any image to exact pixels and download.
Open →Color Picker
Pick a color, copy HEX/RGB/HSL + a shade palette.
Open →Contrast Checker
Check text/background contrast against WCAG AA & AAA.
Open →Image → Base64
Convert an image to a data URI for CSS or HTML.
Open → SoonBackground Remover
Cut out the background from any photo, free.
Merge PDF
Combine several PDFs into one file.
Open →Split PDF
Extract or split pages from a PDF.
Open →Compress PDF
Make a heavy PDF small enough to email.
Open →JPG to PDF
Combine JPG, PNG or WebP images into one PDF.
Open →PDF to JPG
Turn every PDF page into a high-quality image.
Open →Rotate PDF
Turn pages 90°, 180° or 270° — all or a range.
Open →Delete PDF Pages
Remove the pages you don't need, keep the rest.
Open →Word Counter
Words, characters, sentences & reading time, live.
Open →JSON Formatter
Beautify, minify and validate JSON in one click.
Open →QR Code Generator
Turn any link or text into a downloadable QR code.
Open →Password Generator
Strong, random passwords — generated on your device.
Open →Case Converter
UPPER, lower, Title, camelCase, kebab and more.
Open →Base64 Encode/Decode
Convert text or files to and from Base64.
Open →Markdown → HTML
Turn Markdown into clean HTML, live.
Open →URL Encoder / Decoder
Percent-encode or decode URLs & query strings.
Open →Hash Generator
SHA-1/256/384/512 checksums of any text.
Open →UUID Generator
Random UUID v4 identifiers, in bulk.
Open →Lorem Ipsum
Placeholder text for mockups and layouts.
Open →Timestamp Converter
Unix epoch ↔ human date, both ways.
Open →CSV ⇄ JSON
Convert CSV to JSON and back, either way.
Open →JWT Decoder
Inspect a token's header, payload & expiry.
Open →Slug Generator
Turn a title into a clean URL slug.
Open →Base Converter
Binary, decimal, hex & octal, live.
Open →Text Diff
Compare two texts — added & removed lines highlighted.
Open →Regex Tester
Test a pattern with live match highlighting & groups.
Open →Line Tools
Sort, dedupe, trim, reverse & shuffle any list.
Open →Text to Speech
Read any text aloud — pick a voice, speed & pitch.
Open →AI Caption Writer
On-brand captions + hashtags from one line.
Open →AI Rewriter
Rewrite, shorten or improve any text.
Open →Practice Lab
Free playground to try AI generation.
Open →More tools ship every week. Got a request? DM @aithinkfor.you.