Developer Tools
Useful Developer Tools
Free online tools to help with your everyday development tasks.
Formatters
{ }JSON Formatter
Format, validate, and minify JSON data.
</>HTML Formatter
Beautify or minify HTML code.
#CSS Formatter
Beautify or minify CSS stylesheets.
jsJS Formatter
Beautify or minify JavaScript code.
SQLSQL Formatter
Format SQL queries for readability.
<xml>XML Formatter
Format and validate XML documents.
YMLYAML Formatter
Format and validate YAML documents.
Encoders & Decoders
B64Base64 Encode/Decode
Encode or decode Base64 strings and images.
%URL Encode/Decode
Encode or decode URL strings.
&HTML Entities
Encode or decode HTML entities.
JWTJWT Decoder
Decode and inspect JWT tokens.
B32Base32 Encode/Decode
Encode or decode Base32 strings.
B58Base58 Encode/Decode
Encode or decode Base58 strings.
R13ROT13 / ROT47 Cipher
Apply ROT13 and ROT47 ciphers to text.
CRCCRC32 Checksum
Calculate CRC32 checksums of text or files.
xn--Punycode Converter
Convert domains to and from Punycode.
QPQuoted-Printable
Encode or decode quoted-printable text.
Converters
toJSON to YAML
Convert between JSON and YAML formats.
toJSON to CSV
Convert between JSON and CSV formats.
toXML to JSON
Convert between XML and JSON formats.
TSJSON to TypeScript
Generate TypeScript interfaces from JSON.
PYJSON to Python
Generate Python dataclasses from JSON.
JVJSON to Java
Generate Java classes from JSON.
C#JSON to C#
Generate C# classes from JSON.
GOJSON to Go
Generate Go structs from JSON.
{ }JSON Schema Generator
Generate JSON Schema from sample data.
SQLSQL to JSON
Convert SQL CREATE/INSERT to JSON.
?Query String Converter
Convert URL query strings to and from JSON.
0xNumber Base Converter
Convert between Hex, Decimal, Binary, Octal.
TUnix Timestamp
Convert between dates and Unix timestamps.
AaCase Converter
Convert text to camelCase, snake_case, etc.
TXTText to HTML
Convert plain text to HTML with auto-detection.
MDCSV to Markdown
Convert CSV data into a Markdown table.
MDHTML to Markdown
Convert between HTML and Markdown.
Generators
#UUID Generator
Generate UUID/GUID values.
#Hash Generator
Generate MD5, SHA1, SHA256, SHA512 hashes.
P*Password Generator
Generate secure random passwords.
AaLorem Ipsum
Generate placeholder text.
▣QR Code Generator
Generate QR codes from text or URLs.
▣QR Code Scanner
Decode QR codes from an image or camera.
||||Barcode Generator
Generate CODE128, EAN, and UPC barcodes.
/Slug Generator
Convert text to URL-friendly slugs.
OGMeta Tag Generator
Generate SEO meta and Open Graph tags.
IMGPlaceholder Image
Generate placeholder images with custom size.
▦HTML Table Generator
Generate HTML table code with styling options.
MDMarkdown Table Generator
Build Markdown tables with a visual editor.
BOTrobots.txt Generator
Generate robots.txt for search engine control.
.ht.htaccess Generator
Generate Apache .htaccess rules.
DMock Data Generator
Generate realistic fake data for testing.
RMREADME Generator
Generate professional README.md files.
🎲Random Number Generator
Random numbers, dice rolls, and coin flips.
Testers & Inspectors
.*RegEx Tester
Test regular expressions with highlighting.
±Text Diff
Compare two texts and see differences.
MDMarkdown Preview
Preview Markdown with live rendering.
ΣString Inspector
Analyze text: char count, word count, etc.
$.JSON Path Evaluator
Evaluate JSONPath expressions against data.
CSVCSV Viewer
View CSV data as a sortable table.
{T}JSON Tree Viewer
Visualize JSON as an interactive tree.
▶Live Code Preview
Online code editors and compilers.
SVGSVG Preview
Preview and optimize SVG code.
≠JSON Compare
Compare two JSON objects and see diffs.
[ ]Responsive Tester
Test URLs at different screen widths.
CSS Visual Tools
GGradient Generator
Create CSS gradients visually with presets.
▪Box Shadow Generator
Create CSS box shadows with live preview.
[ ]Flexbox Playground
Experiment with Flexbox properties visually.
▦Grid Generator
Create CSS Grid layouts visually.
pxCSS Unit Converter
Convert between px, rem, em, pt, vw, vh.
◜Border Radius
Create CSS border-radius visually.
TsText Shadow
Create CSS text-shadow with live preview.
▸▸Animation Generator
Create CSS keyframe animations visually.
FFilter Generator
Apply CSS filter effects with live preview.
↻Transform Generator
Create CSS transform effects visually.
✂Clip Path Generator
Create CSS clip-path shapes visually.
|||Multi-Column
Create CSS multi-column layouts visually.
□Glassmorphism Generator
Create frosted-glass UI effects with CSS.
▣Neumorphism Generator
Create soft-UI shadow effects with CSS.
⟳CSS Loader Generator
Generate animated CSS loading spinners.
BTNCSS Button Generator
Design and export CSS buttons visually.
ƒCubic Bezier Editor
Build custom CSS easing curves visually.
⚫CSS Blob Generator
Create organic blob shapes with border-radius.
Colors & Accessibility
CColor Picker
Pick colors and convert between formats.
CColor Converter
Convert HEX, RGB, HSL color values.
◆だいやまーくPalette Generator
Generate harmonious color palettes.
◑Contrast Checker
Check WCAG color contrast ratios for accessibility.
👁Color Blindness Simulator
Simulate how images look with color blindness.
▤Shades & Tints Generator
Generate shades, tints, and tones of a color.
◎Color Name Finder
Find the nearest named CSS color.
Text Utilities
↕Line Sort/Dedupe
Sort lines and remove duplicates.
\Escape/Unescape
Escape or unescape special characters.
URLURL Parser
Parse and analyze URL components.
WcWord Counter
Count words, characters, and reading time.
:)Emoji Picker
Browse, search, and copy emojis.
UTFEncoding Detector
Analyze text encoding and byte representation.
F/RFind and Replace
Find and replace text with regex support.
␣Whitespace Cleaner
Trim, collapse, and clean up whitespace.
#Character Counter
Count characters with social media limits.
01Text to Binary
Convert text to binary, hex, or decimal.
·–Morse Code Translator
Translate text to and from Morse code.
NATONATO Phonetic Alphabet
Spell text with the NATO phonetic alphabet.
✎Online Notepad
A notepad that autosaves in your browser.
🔊Text to Speech
Read text aloud with browser voices.
Dev Utilities
*Cron Parser
Parse cron expressions with next run times.
*Cron Expression Builder
Build cron expressions from simple dropdowns.
755Chmod Calculator
Calculate Unix file permissions.
200HTTP Status Codes
Searchable HTTP status code reference.
MMIME Type Lookup
Search MIME types by file extension.
16:9Aspect Ratio Calculator
Calculate and convert aspect ratios.
OGSocial Share Preview
Preview social media share cards.
AaFont Preview
Preview web-safe and Google Fonts.
MINCSS/JS Minifier
Minify CSS or JS with compression stats.
PXPixel Ruler
Visualize pixel spacing scales.
📱Device Mockup
Place screenshots in device frames.
cURLcURL Converter
Convert curl commands to fetch or Python code.
UAUser Agent Parser
Parse a user-agent string into browser and OS.
HDRHTTP Header Analyzer
Analyze and explain HTTP response headers.
Calculators
IPIP Subnet Calculator
Calculate IPv4 subnets, masks, and host ranges.
01Binary & Bitwise Calculator
Bitwise operations and number base conversion.
toUnit Converter
Convert length, weight, temperature, and more.
IVRoman Numeral Converter
Convert between numbers and Roman numerals.
📅Date & Age Calculator
Calculate date differences and ages.
%Percentage Calculator
Percentages, percent of, and percent change.
🌐Time Zone Converter
Convert times between world time zones.
SVG Tools
SVGSVG Optimizer
Minify and clean up SVG code.
SVGSVG to PNG
Convert SVG images to PNG.
SVGSVG to Data URI
Convert SVG to a CSS-ready data URI.
SVGSVG Blob Generator
Generate organic blob shapes as SVG.
SVGSVG Wave Generator
Generate wavy SVG section dividers.
SVGSVG Pattern Generator
Generate tiling SVG background patterns.
Project Files
git.gitignore Generator
Generate a .gitignore for your tech stack.
§License Generator
Generate an open source LICENSE file.
{ }package.json Generator
Generate a package.json for Node.js projects.
EC.editorconfig Generator
Generate an EditorConfig file.
🐳Dockerfile Generator
Generate a starter Dockerfile.
ENV.env Example Generator
Create .env and .env.example files.
Image Editing
❋Background Remover
Remove image backgrounds automatically with AI.
✂Crop Image
Crop an image to any size or aspect ratio.
↻Rotate Image
Rotate an image in 90-degree steps or any angle.
↔Flip Image
Mirror an image horizontally or vertically.
⤡Resize Image
Resize by pixels, percent, cm, mm, or inches.
↗Image Upscaler
Enlarge an image 2x, 3x, or 4x with sharpening.
◐Grayscale Image
Convert photos to grayscale, black-and-white, or sepia.
░Blur Image
Apply an adjustable blur to an image.
▦Pixelate Image
Apply a mosaic or pixelation effect.
□Add Border to Image
Add a colored border or frame to an image.
©Watermark Image
Add a text or logo watermark to an image.
TAdd Text to Image
Place custom text captions on an image.
◯Circle Crop
Crop an image into a transparent circle.
◫Join Images
Merge multiple images into one picture.
⊞Image Splitter
Split an image into a grid of tiles.
◉Image Color Picker
Pick colors from any pixel in an image.
iEXIF Metadata Viewer
View EXIF metadata stored in photos.
🚫Remove EXIF Data
Strip metadata and GPS location from photos.
OCRImage to Text (OCR)
Extract text from photos and screenshots with OCR.
◆Color Palette from Image
Extract the dominant colors from an image.
✍Signature Maker
Draw or type a signature and save it as an image.
Image Converters
IMGImage Converter
Convert images between PNG, JPEG, WebP, BMP.
toPNG to JPG
Convert PNG images to JPG format.
toPNG to WebP
Convert PNG images to WebP format.
toPNG to BMP
Convert PNG images to BMP format.
toPNG to GIF
Convert PNG images to GIF format.
toJPG to PNG
Convert JPG images to PNG format.
toJPG to WebP
Convert JPG images to WebP format.
toJPG to BMP
Convert JPG images to BMP format.
toJPG to GIF
Convert JPG images to GIF format.
toWebP to PNG
Convert WebP images to PNG format.
toWebP to JPG
Convert WebP images to JPG format.
toWebP to BMP
Convert WebP images to BMP format.
toWebP to GIF
Convert WebP images to GIF format.
toBMP to PNG
Convert BMP images to PNG format.
toBMP to JPG
Convert BMP images to JPG format.
toBMP to WebP
Convert BMP images to WebP format.
toBMP to GIF
Convert BMP images to GIF format.
toGIF to PNG
Convert GIF images to PNG format.
toGIF to JPG
Convert GIF images to JPG format.
toGIF to WebP
Convert GIF images to WebP format.
toGIF to BMP
Convert GIF images to BMP format.
toHEIC to JPG
Convert HEIC images to JPG format.
toHEIC to PNG
Convert HEIC images to PNG format.
toHEIC to WebP
Convert HEIC images to WebP format.
toAVIF to JPG
Convert AVIF images to JPG format.
toAVIF to PNG
Convert AVIF images to PNG format.
toAVIF to WebP
Convert AVIF images to WebP format.
Image Compression
⇲Compress Image
Reduce image file size to a target in KB.
⇲Bulk Image Compressor
Compress many images at once to a target size.
↑Increase Image Size
Pad an image file up to a larger target size.
⇲Compress Image to 10 KB
Compress an image down to about 10 KB.
⇲Compress Image to 20 KB
Compress an image down to about 20 KB.
⇲Compress Image to 50 KB
Compress an image down to about 50 KB.
⇲Compress Image to 100 KB
Compress an image down to about 100 KB.
⇲Compress Image to 200 KB
Compress an image down to about 200 KB.
⇲Compress Image to 500 KB
Compress an image down to about 500 KB.
⇲Compress Image to 1 MB
Compress an image down to about 1 MB.
⇲Compress Image to 2 MB
Compress an image down to about 2 MB.
Social Media
⤡Social Media Image Resizer
Resize and crop images for any social platform.
⤡Resize for Instagram Post
Crop and resize an image to the Instagram Post size.
⤡Resize for Instagram Portrait Post
Crop and resize an image to the Instagram Portrait Post size.
⤡Resize for Instagram Landscape Post
Crop and resize an image to the Instagram Landscape Post size.
⤡Resize for Instagram Story
Crop and resize an image to the Instagram Story size.
⤡Resize for Instagram Profile Photo
Crop and resize an image to the Instagram Profile Photo size.
⤡Resize for Facebook Post
Crop and resize an image to the Facebook Post size.
⤡Resize for Facebook Cover Photo
Crop and resize an image to the Facebook Cover Photo size.
⤡Resize for Facebook Profile Photo
Crop and resize an image to the Facebook Profile Photo size.
⤡Resize for Facebook Story
Crop and resize an image to the Facebook Story size.
⤡Resize for Facebook Event Cover
Crop and resize an image to the Facebook Event Cover size.
⤡Resize for X Post Image
Crop and resize an image to the X Post Image size.
⤡Resize for X Header Banner
Crop and resize an image to the X Header Banner size.
⤡Resize for X Profile Photo
Crop and resize an image to the X Profile Photo size.
⤡Resize for YouTube Thumbnail
Crop and resize an image to the YouTube Thumbnail size.
⤡Resize for YouTube Channel Banner
Crop and resize an image to the YouTube Channel Banner size.
⤡Resize for YouTube Profile Photo
Crop and resize an image to the YouTube Profile Photo size.
⤡Resize for LinkedIn Post Image
Crop and resize an image to the LinkedIn Post Image size.
⤡Resize for LinkedIn Cover Banner
Crop and resize an image to the LinkedIn Cover Banner size.
⤡Resize for LinkedIn Profile Photo
Crop and resize an image to the LinkedIn Profile Photo size.
⤡Resize for LinkedIn Company Logo
Crop and resize an image to the LinkedIn Company Logo size.
⤡Resize for TikTok Video Cover
Crop and resize an image to the TikTok Video Cover size.
⤡Resize for TikTok Profile Photo
Crop and resize an image to the TikTok Profile Photo size.
⤡Resize for Pinterest Pin
Crop and resize an image to the Pinterest Pin size.
⤡Resize for Pinterest Profile Photo
Crop and resize an image to the Pinterest Profile Photo size.
⤡Resize for WhatsApp Profile Photo
Crop and resize an image to the WhatsApp Profile Photo size.
⤡Resize for WhatsApp Status
Crop and resize an image to the WhatsApp Status size.
Video Tools
✂Video Trimmer
Cut a section out of a video in your browser.
⇲Video Compressor
Reduce video file size by lowering resolution and bitrate.
♫MP4 to MP3
Extract the audio track from a video as MP3 or WAV.
GIFVideo to GIF
Convert a video clip into an animated GIF.
IMGVideo Frame Extractor
Save a still image from any frame of a video.
Recorders & Device Tests
Meme Tools
PDF Tools
PDFImage to PDF
Convert JPG, PNG, and WebP images into a PDF.
⨁Merge PDF
Combine multiple PDF files into one document.
✂Split PDF
Extract a page range, delete pages, or split to singles.
📷PDF to Image
Render PDF pages to JPG or PNG images.
⇲Compress PDF
Reduce PDF file size by re-rendering its pages.
TXTPDF to Text
Extract all text from a PDF document.
↻Rotate PDF
Rotate all pages or single pages in a PDF.
▤Organize PDF Pages
Reorder or delete pages in a PDF.
#Add Page Numbers to PDF
Stamp page numbers onto a PDF document.
GIF Tools
Audio Tools
✂Audio Cutter
Trim and cut a section from an audio file.
♫Audio Joiner
Merge several audio files into one track.
♪Audio Volume and Fade
Change volume and add fade in or fade out.
WAVAudio to WAV Converter
Convert MP3, OGG, M4A and more to WAV.
iAudio Metadata Viewer
View duration, sample rate, and bitrate.
Audio Converters
toMP3 to WAV
Convert MP3 audio to WAV format.
toOGG to WAV
Convert OGG audio to WAV format.
toM4A to WAV
Convert M4A audio to WAV format.
toFLAC to WAV
Convert FLAC audio to WAV format.
toWAV to MP3
Convert WAV audio to MP3 format.
toOGG to MP3
Convert OGG audio to MP3 format.
toM4A to MP3
Convert M4A audio to MP3 format.
toFLAC to MP3
Convert FLAC audio to MP3 format.
SEO Tools
★Favicon Generator
Create a favicon.ico and PNG icon set from an image.
☰Sitemap Generator
Generate an XML sitemap from a list of URLs.
LDJSON-LD Schema Generator
Generate structured data markup for SEO.
UTMUTM Link Builder
Build campaign tracking URLs with UTM tags.
🌐Hreflang Tag Generator
Generate hreflang tags for multilingual sites.
Security & Crypto
🔒AES Encrypt / Decrypt
Encrypt or decrypt text with AES-GCM.
🔑Key Pair Generator
Generate RSA or EC public and private key pairs.
MACHMAC Generator
Compute HMAC signatures with SHA hashes.
JWTJWT Signer
Create and sign JSON Web Tokens.
TOKToken Generator
Generate secure random tokens and UUIDs.
🔒Bcrypt Hash Generator
Generate and verify bcrypt password hashes.
P?Password Strength Checker
Test how strong a password really is.