Tools

Validate Ethereum and EVM addresses, including checksum formatting.

Convert an EVM address into its EIP-55 checksum format instantly.

Convert token display amounts to raw integer units using token decimals.

Convert between wei, gwei, and ETH amounts instantly.

Calculate total gas cost from gas limit and gas price inputs.

Decode raw signed EVM transactions into readable fields instantly.

Decode EVM calldata using a provided function fragment.

Decode EVM event logs from topics and data using an event fragment.

ABI-encode Solidity types and values into a hex payload instantly.

ABI-decode hex data into typed Solidity values in the browser.

Generate Keccak-256 hashes for text or hex input in the browser.

Verify whether a signed message matches an expected EVM address.

Recover the signer address from a message and EVM signature.

Check latest and pending EVM account nonce values from a live RPC endpoint.

Inspect contract bytecode size, metadata hints, and EIP-170 usage.

Generate a random Bitcoin address with common address formats in the browser.

Validate Bitcoin base58 and bech32 addresses in the browser.

Generate a batch of random Bitcoin addresses for quick testing or fixtures.

Decode raw Bitcoin transactions into summary fields instantly.

Parse Bitcoin raw transactions into detailed input and output data.

Calculate Bitcoin transaction fees and fee rates from inputs and outputs.

Estimate Bitcoin fees from virtual size and a target sat/vB rate.

Convert between BTC amounts and satoshis instantly.

Decode Bitcoin script hex into ASM opcodes and data pushes.

Estimate Bitcoin transaction size, vbytes, and weight units.

Calculate Bitcoin change output values from inputs, send amount, and fees.

Estimate Bitcoin dust thresholds for common output types.

Convert and inspect Bitcoin nLockTime values as heights or timestamps.

Estimate Bitcoin transaction weight units, witness bytes, and virtual size.

Build a simple Bitcoin PSBT from input, recipient, and optional change details.

Decode a Bitcoin PSBT into readable inputs, outputs, and signing fields.

Analyze PSBT signing completeness, UTXO coverage, and visible fee data.

Build a simple Ordinals inscription manifest and content preview in the browser.

Estimate commit and reveal fees for a simple Ordinals inscription flow.

Estimate reveal size, script bytes, and chunk count for Ordinals content.

Analyze a raw signed EVM transaction and summarize gas, bytes, and signature data.

Query the same EVM transaction hash across multiple preset chains.

Estimate AMM swap price impact from reserves, trade size, and fee bps.

Calculate minimum received and actual slippage against a chosen tolerance.

Estimate cross-venue arbitrage profit after fees, slippage, and transfer costs.

Measure oracle update lag against a reference timestamp and heartbeat.

Estimate calldata gas overhead and fee savings from a possible gas reduction.

Estimate collateral LTV, liquidation price, and remaining buffer.

Clean up prompt structure, spacing, and inline sections for reuse.

Generate reusable prompt templates for writing, coding, or research tasks.

Turn plain text notes into a simple markdown structure instantly.

Preview markdown with headings, lists, and inline formatting in the browser.

Turn structured JSON fields into a readable prompt template.

Explain code structure with a lightweight browser-side summary.

Create a short summary from a longer text block with a simple heuristic.

Extract repeated keyword candidates from a text block quickly.

Estimate prompt token usage from text length with a fast rough heuristic.

Convert raw conversation text into chat-role lines or bullet notes.

Convert Unix timestamps into readable UTC, local time, and ISO dates.

Get the current Unix timestamp in seconds and milliseconds instantly.

Switch between 10-digit seconds timestamps and 13-digit milliseconds.

Calculate the exact gap between two dates in days, hours, minutes, and seconds.

Measure the difference between two times, including overnight spans.

Add days, hours, and minutes to a base date and preview the result.

Subtract days, hours, and minutes from a base date and preview the result.

Count business days between two dates and separate weekends.

Add working days to a start date while skipping weekends.

Calculate exact age in years, months, and days from any birth date.

Count down live to a target date and time in the browser.

Convert a date and time from one timezone to another with UTC output.

Compare two timezones and inspect their current offsets and local times.

Convert a date into its ISO week number and week year.

Find the day number within the year and how many days remain.

Check whether a year is a leap year and see the matching rule.

Turn one date input into ISO, UTC, local, and common calendar formats.

Parse a human-readable date string into UTC, ISO, local time, and timestamp.

Convert a duration into total seconds, minutes, hours, and milliseconds.

Format and pretty-print JSON with indentation for easier reading.

Minify JSON by removing whitespace and compressing it into one line.

Validate JSON input and show whether the structure is valid.

Escape JSON string content or unescape it back into readable text.

Convert JSON arrays or objects into CSV rows instantly.

Convert CSV data with headers into structured JSON instantly.

Convert XML nodes and attributes into readable JSON.

Convert common YAML objects and lists into JSON instantly.

Compare two JSON documents and inspect added, removed, or changed paths.

Flatten nested JSON objects into dot-path key/value pairs.

Encode text to Base64 or decode Base64 back into readable text.

Encode or decode URL components for query strings and safe links.

Decode JWT header and payload values instantly in the browser.

Generate MD5 and SHA-256 hashes for any text input instantly.

Decode hexadecimal bytes into readable UTF-8 text instantly.

Convert plain text into hexadecimal bytes for debugging or encoding checks.

Decode 8-bit binary bytes into readable UTF-8 text instantly.

Convert plain text into 8-bit binary bytes for quick inspection.

Convert text into Unicode code points or decode Unicode escapes back to text.

Compare two text blocks line by line and inspect added or removed lines.

Count words, characters, lines, and paragraphs in a block of text.

Convert text between lower, upper, title, sentence, and slug-style cases.

Turn text into a clean URL-friendly slug instantly.

Remove duplicate lines while preserving the first occurrence.

Sort lines alphabetically with direction and whitespace controls.

Test a regular expression against text and inspect matches instantly.

Run regex-based find and replace in the browser with instant output.

Generate random strings with configurable length and character sets.

Generate one or more UUID v4 values instantly in the browser.

Estimate compound growth with recurring monthly contributions.

Calculate simple interest and total repayment from principal, rate, and time.

Estimate monthly loan payments, total paid, and total interest.

Estimate mortgage monthly payments, loan principal, and total interest.

Calculate return on investment and net profit from cost and return values.

Calculate average cost, units accumulated, and current value from recurring buys.

Calculate stock average cost basis, total shares, and unrealized profit or loss.

Calculate profit or loss amounts and percentage margin from buy and sell prices.

Calculate percentages, percent-of-total values, and reverse percentage totals.

Calculate discount savings and final sale price instantly.

Calculate tax amount and total price from a pre-tax value and rate.

Calculate VAT amount and gross total from a net amount instantly.

Convert between two currencies with a custom exchange rate input.

Inspect a manual exchange-rate history series with change, high, low, and average values.

Adjust a present amount by inflation and compare future purchasing power.

Project long-term savings growth with monthly contributions and return assumptions.

Calculate net profit and net profit margin from revenue and expenses.

Calculate break-even units and revenue from fixed and variable costs.

Convert numeric RMB amounts into Chinese uppercase money text for invoices and receipts.

Measure typing speed, accuracy, and completion time in the browser.

Measure how many clicks you can make in a short timed test.

Test your visual reaction speed by clicking as soon as the panel changes.

Play a browser number guessing game with attempt tracking.

Flip a virtual coin and track heads or tails results instantly.

Roll one or more virtual dice and see the total immediately.

Play a simple card matching memory game with move counting.

Play a browser version of 2048 and merge tiles toward the winning block.

Generate a browser sudoku puzzle with editable cells and answer checking.

Pick one option at random from a custom list instantly.

Generate random integers or decimals within a chosen range.

Generate random passwords with adjustable length and symbol options.

Generate random hex colors and preview a quick palette.

Generate random CSS linear gradients with instant preview output.

Pick a random option from a custom list with a wheel-style chooser.

Process image resize tool for common image and file tasks.

Process image compress tool for common image and file tasks.

Process image crop tool for common image and file tasks.

Convert between image format formats quickly.

Convert a JPG image into PNG format directly in the browser.

Process png to jpg for common image and file tasks.

Convert an uploaded image into a Base64 data URL instantly.

Decode a Base64 image string and preview it in the browser.

Render a PDF page into a downloadable PNG preview in the browser.

Combine one or more JPG or PNG images into a downloadable PDF file.

Merge multiple PDF files into a single PDF in browser order.

Split a PDF by page ranges or export every page as separate files.

Run a lightweight browser-side PDF optimization pass and compare file size.

Convert file sizes across bytes, KB, MB, GB, and TB.

Convert raw byte values into decimal and binary storage units.