Everything on sourcecodestack

Overview of all tools, apps, and resources

Our story, mission, and privacy philosophy

Meet the team behind sourcecodestack

Get in touch with feedback or questions

Frequently asked questions about the platform

In-depth articles, tutorials, and guides

Browse the complete tools directory

Format, validate, and minify JSON data

Generate MD5, SHA-1, SHA-256, SHA-512, and JWT tokens

Encrypt and decrypt text with AES and Base64

Live HTML, CSS, and JavaScript editor with preview

Validate HTML, CSS, and JavaScript code

Test REST APIs without Postman or installing software

Create and test fake API endpoints for development

Inspect file format, metadata, MIME type, and size

View and analyze CSV and Excel files in the browser

Minify web assets to reduce file size and improve speed

Check if a website is online and responding

Create and extract ZIP archives in the browser

Transform text: case conversion, word count, deduplication, slug generator

Calculate date differences, add/subtract time, timezone conversion

Compare prices per unit to find the best value when shopping

Test every key and mouse button to diagnose hardware issues

Test and improve your typing speed with WPM tracking

Countdown timer, lap stopwatch and Pomodoro focus timer with alarm

BMI, calories, body fat, ideal weight, macros, water and due date

Convert 30+ currencies with daily European Central Bank rates

Length, weight, temperature, volume, speed, data and cooking units

Add/remove tax, calculate discounts, and price for profit

Pick colors, generate palettes, and check contrast ratios

Create perfectly sized graphics for Instagram, Twitter, LinkedIn, and more

Merge, split, compress, convert, and annotate PDF files

Annotate, highlight, fill forms, and sign PDF documents

Listen to PDF documents with text-to-speech technology

Convert between JPEG, PNG, WebP, AVIF, GIF, BMP, TIFF, and ICO

Browse all available games

Play modern Tic Tac Toe with PvP and Computer modes, live scoreboard, turn indicators, and smooth reset controls.

Battle the computer in quick rounds with live win-loss tracking and responsive controls.

Flip and match card pairs to test memory and focus with modern puzzle visuals.

Guess the hidden number between 1 and 100 using hints before your attempts run out.

Classic word-guessing challenge with keyboard-friendly letter selection and score tracking.

Solve fast arithmetic questions and improve your accuracy and streak performance.

Measure your reflex speed by clicking at the perfect moment and track your best timing.

Unscramble mixed letters, build vocabulary, and test your language speed.

Slide and merge numbered tiles to reach 2048. Addictive sliding-puzzle strategy with score and best-score tracking.

The timeless logic game — clear the board without hitting a mine, using number clues and flags. Three difficulty levels.

Fill the 9x9 grid so every row, column, and box has 1-9. Fresh puzzles in three difficulties with check and solve.

Guess the hidden 5-letter word in six tries with color hints for correct and misplaced letters. A new word every game.

Play draughts against the computer with full standard rules — compulsory captures, multi-jump chains and king promotion, across three difficulty levels.

Find every hidden word by dragging across the grid — eight topics, three difficulties, your own word lists, and a clean printable puzzle sheet.

Bounce the ball off your paddle to smash every brick — the contact point steers the shot, with reinforced bricks, power-ups and a ball that speeds up as the wall thins.

Target archery with the physics actually simulated — draw the bow for power, then read the crosswind and gravity to put ten arrows in the gold.

Hit the coloured tile in every row before it reaches the bottom while the board speeds up — and every tap plays the next note of a real melody.

Play classic Klondike Solitaire with Draw 1 and Draw 3 modes, undo, auto-finish, a timer and move counter. Tap to move — works on mobile and desktop.

Play a full game of chess against a look-ahead computer opponent — all the real rules including castling, en passant, promotion and checkmate, with legal-move highlighting.

Match free pairs of identical tiles to clear the layered board — a tile is free when nothing sits on top and one side is open. Every deal is guaranteed solvable.

Aim and fire bubbles to match three or more of the same colour and pop them — detach clusters for bonus points and clear the board. Bounce shots off the walls.

The falling-blocks classic — rotate and drop the seven block shapes to pack rows tightly and clear full lines. Speeds up as you go, with a saved high score.

Tap the moles as fast as you can before they duck back down — a 30-second reflex and hand-eye coordination test with a saved high score.

The classic memory game — watch the colour-and-tone sequence and repeat it back, growing one longer each round. Each pad has its own musical note.

The classic sliding-tile puzzle — slide the numbered tiles to order 1–15. Always solvable, with a move counter, timer and saved best time.

Drop discs to line up four in a row before your opponent — play against a look-ahead computer AI or a friend in 2-player mode.

The classic arcade game — eat, grow, and avoid crashing into the walls or your own tail. Keyboard, touch and swipe controls with a saved high score.

How we handle (or don't handle) your data

Terms governing your use of sourcecodestack

Important disclaimers about the platform

Browse the complete articles index

BMI, calories, body fat, macros and due dates explained

Countdown vs stopwatch, Pomodoro focus, accurate timing

Mid-market vs retail rates and avoiding hidden FX fees

Metric vs imperial formulas and cups-to-grams by ingredient

Price for profit and handle tax, VAT and discounts

Klondike rules, winning strategy and Draw 1 vs Draw 3

Multi-track timeline, FFmpeg, transitions & export

Improve WPM with timed tests and difficulty levels

Text-to-speech for PDFs with word highlighting

Edit, annotate, sign, and protect PDFs online

Test REST APIs with auth, headers, and history

Run JS, TS, Python, HTML & SQL in your browser

Prettify, validate, minify, and compare JSON

Simulate REST endpoints without a backend

Lint HTML, CSS, JS & more in your browser

SHA-256, MD5, Base64, JWT & HMAC online

Check any URL's status and response time

AES-256 encryption, RSA keys & password generator

Diagnose any key or button in your browser

Create, extract & preview ZIP archives

Inspect MIME type, EXIF data, and file hash

Reduce code size for production builds

Open, filter, sort & export spreadsheets

Convert HEX/RGB/HSL and generate color harmonies

Word count, case convert, sort lines & more

Business days, age, countdowns & duration

Find best value across pack sizes with unit conversion

Play vs unbeatable minimax AI or a friend

Train short-term memory with card flip game

Benchmark your reflexes in milliseconds

Guess tech vocabulary before running out of chances

Sharpen mental arithmetic with timed challenges

Unscramble jumbled letters in timed rounds

Classic hand game vs computer AI

Hot/cold feedback to find the hidden number

Create assets for all platforms

PNG vs JPG vs WEBP vs AVIF compared

Reduce file size without losing quality

DPI, PPI, and resolution for print and screen

Build polished PDFs from images

Convert hundreds of images at once

RGB vs CMYK vs sRGB vs Adobe RGB