ToolsTopus
Free browser-based tools. No uploads, no sign-up.
Image Utilities
All Image Utilities →Image Resizer
Resize images by exact pixels in your browser with aspect-ratio lock, transparent output and format-aware quality controls.
Image Compressor
Compress one image or a batch locally with quality, target-size, transparency and ZIP controls, then compare and download every result.
Image Format Converter
Convert JPG, PNG, WebP, AVIF, GIF, BMP and ICO images locally in your browser with previews, batch ZIP export and transparency controls.
Image Cropper
Crop images to popular aspect ratios like 1:1, 16:9 and 4:3, or set a fully custom crop area.
Photo Filters
Adjust brightness, contrast, saturation and blur live with simple canvas-based photo filters.
Watermark Adder
Overlay a custom text or logo watermark on your images with adjustable opacity and position.
Video Utilities
All Video Utilities →Video Cutter
Trim a video to a precise start and end point, processed locally in your browser.
Video Compressor
Reduce a video's file size by adjusting resolution and bitrate, without uploading it anywhere.
Video Audio Extractor
Extract an audio track from browser-supported video files and export it as MP3 or WAV.
Video Format Converter
Convert between selected video formats when your browser supports the required container and codec.
GIF Maker from Video
Capture frames from a video clip and export them as a looping animated GIF.
Video Speed Controller
Change a video's playback speed anywhere from 0.5x up to 3.0x.
PDF & Documents
All PDF & Documents →PDF Compressor
Reduce image-heavy PDF size by rasterizing pages and adjusting JPEG quality; selectable text is not preserved.
PDF Merger
Combine multiple PDF files into a single document, in the order you choose.
PDF Splitter
Extract specific page ranges from a PDF into separate downloadable files.
Image to PDF
Stack multiple images vertically and export them as a single downloadable PDF.
TXT to PDF Converter
Wrap plain text into a cleanly formatted, paginated PDF document.
PDF Page Numberer
Automatically stamp sequential page numbers at the bottom of every page.
Audio Utilities
All Audio Utilities →Audio Cutter
Trim an audio clip to an exact range — perfect for creating ringtones.
Audio Merger
Join multiple audio clips together, in sequence, into a single file.
Audio Converter
Convert between the offered audio formats when your browser supports the required codecs.
Audio Compressor
Lower an audio file's bitrate to shrink its size while keeping it listenable.
Audio Recorder
Record audio directly from your microphone and export it instantly.
Developer & Coding
All Developer & Coding →Base64 Text Encoder/Decoder
Encode plain text to Base64, or decode Base64 back into readable text.
URL Encoder/Decoder
Safely encode or decode URLs and query string parameters.
HTML Entity Encoder/Decoder
Convert special characters to safe HTML entities, and back again.
JSON Validator
Validate JSON syntax and get a precise line and column number for any error.
JSON Minifier
Compress bloated JSON by stripping out all unnecessary whitespace.
Code Beautifier
Reformat minified or messy JSON, CSS or HTML into clean, indented code.
Security & Networking
All Security & Networking →Cryptographic Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text input.
Bcrypt Hasher & Verifier
Hash a password with real bcrypt and a random salt, or verify it against an existing bcrypt hash.
JWT Token Decoder
Decode a JSON Web Token instantly to inspect its header and payload.
Connection & Browser Profiler
View your browser's user-agent, screen, timezone and connection details.
Network Toolkit
Look up a simulated DNS and ping-style network profile for any host.
Password Entropy Simulator
Estimate how long a password would take to crack, based on length and character set.
Webmaster & SEO
All Webmaster & SEO →Robots.txt Builder
Visually configure crawler rules and generate a valid robots.txt file.
Sitemap XML Generator
Turn a plain list of URLs into a standards-compliant sitemap.xml.
SEO Meta Tag Generator
Generate title, description, Open Graph and Twitter Card meta tags in one go.
Redirect Script Generator
Generate 301 or 302 redirect rules for .htaccess or Nginx configuration.
Google SERP & Social Card Previewer
Preview how your page may appear in Google search results, Twitter Cards, and Facebook/LinkedIn shares.
Text & Content Tools
All Text & Content Tools →Word & Character Counter
Continuously count words, characters, sentences and estimated reading time as you type.
Case Converter
Switch text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase and more.
Lorem Ipsum Generator
Generate placeholder filler text by paragraph, sentence or word count.
Find and Replace
Run a bulk find-and-replace across a block of text, with optional regex support.
Raffle / Giveaway Picker
Randomly pick one or more winners from a list of names.
Text Diff Checker
Compare two blocks of text side by side with additions and removals highlighted.
Financial & Calculators
All Financial & Calculators →Percentage Calculator
Solve percentage increases, decreases, ratios and reverse percentages.
Unit Converter
Convert between units of length, weight, temperature and data size.
Aspect Ratio Calculator
Calculate matching pixel dimensions for any aspect ratio, like 16:9 or 21:9.
BMI Calculator
Calculate Body Mass Index from height and weight against standard ranges.
Age Calculator
Calculate an age from a birth date in calendar years, months and days, plus the total number of days.
Loan Amortization Calculator
Estimate monthly payments and total interest, then inspect the principal, interest and balance for every fixed-rate loan payment.
Math & Education
All Math & Education →GCD & LCM Solver
Instantly find the greatest common divisor and least common multiple of two numbers.
Prime Number Checker
Check whether a number is prime, and list all primes within a range.
Roman Numeral Converter
Convert integers to Roman numerals, and Roman numerals back into integers.
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal.
Fraction Calculator
Add, subtract, multiply and divide fractions, including mixed numbers.
Matrix Solver
Compute determinants, transpositions and matrix multiplication.
Design & CSS UI
All Design & CSS UI →CSS Box Shadow Generator
Design multi-layered box shadows visually and copy the ready-made CSS.
CSS Gradient Generator
Build linear and radial gradients visually and export the CSS.
Glassmorphism Generator
Create frosted-glass UI panels with adjustable blur and transparency.
Border Radius Generator
Adjust all four corner radii independently, preview the shape live and copy the generated CSS border-radius declaration.
SVG Blob Generator
Generate random organic blob shapes as ready-to-use SVG paths.
SVG Optimizer
Strip unnecessary metadata and whitespace from SVG code to shrink its size.
Social, Gaming & Trends
All Social, Gaming & Trends →Social Handle Generator
Generate available-sounding username ideas from your keywords.
Hashtag Index
Browse a categorized collection of commonly used hashtags with one-click copy.
Dice, Coin & Wheel
Roll animated dice, flip a coin or spin a customizable wheel — with history and running totals.
Invisible Character Copier
Copy invisible, blank Unicode characters for bios and usernames.
Minecraft Color Code Tool
Format chat text with Minecraft's color and formatting codes.
Nickname Font Decorator
Decorate usernames with stylish Unicode symbols and accents.