All Free Developer Tools
Alphabetically Organized

Stamp page numbers on PDF documents

Stamp text or image watermark on PDFs

AI-powered background removal tool

Encode/decode Base64 for files, images, and text

Generate CSS border-radius with presets, fancy mode & drag handles

Generate CSS box shadows visually

Convert text between 16 case formats instantly

Beautify code for readability

Compare code differences

Replace colors in images

Convert colors across 12 formats

Generate color harmonies

Generate color palettes

Side-by-side visual comparison of two PDFs

Reduce PDF file size without losing quality

Crop margins or custom areas from PDF pages

Generate CSS keyframe animations

Generate stunning CSS buttons with icons & effects

Create CSS gradients with live preview and copy code

Generate CSS grid layouts visually

Compress CSS for faster websites

Generate 2D & 3D CSS transforms visually

Convert CSS units — all 14 at once

Convert CSV to JSON format

Remove specific pages from a PDF file

Find duplicate images in collections

Add text and annotations to PDF files

View image EXIF data and metadata

Extract specific pages into a new PDF

AI face detection and blur in browser

Convert forms and annotations to static content

Generate CSS flexbox layouts

Convert images to grayscale

Add grid lines to images

Generate & verify MD5, SHA-1, SHA-256, SHA-512 hashes

Encode/decode HTML entities

Convert HTML to PNG or JPG image

Convert HTML content to a PDF document

Minify and beautify HTML, CSS, JavaScript code

60+ HTTP status codes with cause, fix steps, and MDN links

Blur images with 4 blur types

Add borders and frames to images

Extract colors from images

Compress JPG, PNG, WebP up to 90% smaller

Crop images with preset aspect ratios

Apply filters and effects to images

Convert between JPG, PNG, WebP, GIF formats

Combine multiple images into one

Resize images to any dimensions instantly

Rotate images to any angle

Sharpen and enhance image clarity

Split images into tiles for social media

Convert images to Base64 URI — batch & 7 formats

AI-powered image upscaling up to 4x in browser

Lookup IP or domain geolocation & network info

Convert images to a PDF document

Format, validate and beautify JSON with error detection

Convert JSON to CSV and vice versa

Convert JSON to YAML format

Decode & verify JWT tokens

Check keyword density for SEO

Generate placeholder lorem ipsum text

Convert Markdown to HTML

Create memes with custom text instantly

Combine multiple PDFs into one document

Generate SEO and social media meta tags

Remove noise from photos

Make scanned PDFs searchable with OCR

Preview social media cards

Generate OG meta tags with preview

Reorder and delete PDF pages visually

Check WCAG contrast ratios across your entire color palette

Generate secure passwords

Check password strength & breach status

Fill in PDF form fields online

Convert PDF pages to JPG images

Convert PDF pages to PNG images

Extract plain text from PDF files

Pixelate images or specific areas

Password-protect PDF with AES encryption

Create QR codes for URLs and text

Build URL query strings with encoding & fragment support

Generate secure random strings

Check readability score

Permanently hide sensitive content in PDFs

Test regex patterns

Fix corrupted or damaged PDF files

Generate robots.txt for SEO

Rotate PDF pages 90°, 180° or 270°

Scan documents with your camera to PDF

Generate JSON-LD schema markup for 19 types

Add shadow effects to images

Add your signature to PDF documents

Split PDF into pages or custom ranges

Add text overlays to images

Create optimized image thumbnails

Unix timestamp ↔ human date converter

Convert plain text files to PDF documents

Remove password from PDF files

Encode/decode URLs with breakdown

Generate SEO-friendly slugs

Parse any UA string — browser, OS, device, bots & more, instantly

Build UTM tracking URLs

Generate & validate UUIDs v1, v4, v5, v7

Add vignette darkening effect

Add watermarks to protect images

Check WCAG contrast ratios

Count words and characters

Generate XML sitemaps with bulk import

Convert XML to JSON format

Convert YAML to JSON format