DATA

HAR Extractor

Inspect API requests, headers, and responses from a HAR file.

JSON Tools

Format, compare, redact, and convert JSON ↔ CSV, YAML, & TS.

Log Analyzer

Filter and search large log files by level, file, or pattern.

Document Analyzer

Filter PDF/DOCX/CSV/TXT documents (or a whole folder) for keywords.

ENCODING

Base64 Converter

Decode a base64 string or data URI into an image, PDF, or audio file.

File to Base64 Encoder

Encode any file into Base64 data URI, HTML <img> or CSS background.

Base64 Text Encoder

Encode and decode plain text as Base64, Hex, Binary, and URL-safe.

URL Encoder / Decoder

Encode/decode full URLs and parse query parameters interactively.

SECURITY

JWT Decoder

Decode a JWT's header, payload, expiry status, and verify signature.

Password Generator

Generate secure random passwords & passphrases with entropy analysis.

UUID & Hash Generator

Generate UUID v4, v7, NanoID, and MD5, SHA-256, SHA-512, HMAC.

TEXT

Regex Tester

Test regular expressions against sample text with live match highlights.

Text Diff

Line-by-line and character diff for plain text — configs, code, or notes.

Case & Text Utilities

Convert casing, slugify, sort lines, trim, and deduplicate lines.

HTML Editor & Live Preview

Live sandbox for HTML, CSS, JS with console logs and Markdown live preview.

UTILITIES

Timestamp Converter

Convert between epoch time and human-readable dates with date math.

Number Base Converter

Convert decimal, hex, octal, binary, and IEEE-754 float sign/exponent bits.

Color Converter

Convert HEX/RGB/HSL/CMYK and check WCAG contrast & harmony palettes.

Cron Explainer

Explain cron expressions in plain English and calculate upcoming runs.

PDF Tools

Merge, split, extract text, and convert images to PDF completely client-side.

HAR Extractor & Inspector

Parse HTTP Archive files (.har) to inspect API requests, response payloads, timing waterfalls, and headers.

Load Sample HAR Clear

Drag and drop a .har file here, or browse

All Status Codes 2xx Success 3xx Redirect 4xx Client Error 5xx Server Error All Methods GET POST PUT DELETE PATCH Export CSV

Status	Method	URL / Resource	Type	Size	Time Waterfall	Action

Request Details

Copy as cURL ×

Headers Payload / Body Response Content Timings

JSON Studio

Format, auto-repair, query, visualize, and convert JSON data.

Editor Converters

0/0

.* Aa \b ▲ ▼ Replace All

Sample JSON

JSON Document Editor ✓ Valid JSON

0 rows

25 rows/page 50 rows/page 100 rows/page 250 rows/page All rows Export CSV { } Code

Showing 0 of 0

◀ Prev Next ▶

Unfold Fold L1 L2

* Double-click any leaf value (string, number, boolean) to edit inline. Press Enter to apply.

JSON ➔ CSV CSV ➔ JSON JSON ➔ YAML YAML ➔ JSON JSON ➔ XML TS Interface

Query

Converted Output

Download

OPTIONS

Import

Drag file here or click

Settings

Indentation

2 spaces 4 spaces

Minify (single line) Sort keys A-Z

Stats

0 keys

0 B

History

Clear history

Base64 to Media & File Converter

Decode Base64 strings or Data URIs directly into viewable images, PDFs, audio, or downloadable binary files.

Sample Image Clear

Base64 String or Data URI

Decode & Preview

Decoded Preview & Hex Stream

Preview will appear here

Download Decoded File

File to Base64 Encoder

Convert any file into Base64 Data URI, HTML img tag, CSS background URL, and raw payload.

Drag any file here, or browse file

Base64 Payload / Data URI

OPTIONS

Include Data URI prefix

MIME Type

None

Base64 & Hex Text Encoder / Decoder

Encode and decode plain text in UTF-8 Base64, URL-Safe Base64, Hexadecimal, Binary, and Rot13.

Plain Text Encode →

Base64 URL-Safe Hex Binary ROT13

← Decode Copy

Log Analyzer & Stream Filter

Filter huge log streams by severity level, regex, keywords, and timeline slices.

Load Sample Logs Clear All

Regex Aa

Use | for OR • Enter/↓ next, Shift+Enter/↑ previous • Ctrl+F to focus

Drag and drop log files here, or use import actions:

Choose File Import Folder

0 / 0 lines

▲ - / 0 ▼

No logs loaded. Drop files, choose folders, or load sample logs to begin.

OPTIONS

Active Files

No active files

Level Distribution

Timeline

Lines over time (Click a bar to filter)

Filters

Error Warn Info Debug Trace Other

Common

Timestamp & Epoch Converter

Convert between Unix Epoch timestamps and local/UTC date-time representations.

now Friday, 28 August 2026

Input

Epoch (seconds)

Date & time (local)

All Formats

ISO 8601 (UTC)

-

UTC string

-

Local string

-

Unix seconds

-

Unix milliseconds

-

Relative

-

Options

Epoch Unit

seconds milliseconds

Actions

Set to Now

Adjust Time

-1 hour +1 hour -1 day +1 day

JWT Decoder & Signature Verifier

Decode JSON Web Tokens, inspect expiration countdowns, issued-at timestamps, and verify HMAC-SHA256 signature.

Sample JWT Clear

Encoded JWT Token

Header

Payload / Claims

HMAC-SHA256 Secret Key (Signature Verification)

Verify Signature

URL Encoder / Decoder

Encode and decode URLs or parameter components in real-time bidirectionally.

Plain text

Load

Encoded

OPTIONS

Settings

Component Full URI

encodeURIComponent — escapes reserved URL characters (&, ?, /, =, ...)

Clear

Stats

0 chars in

0 chars out

History

Clear history

UUID, Hash & Checksum Studio

Generate UUIDs (v4, v7 timestamp-ordered), NanoID, ULID, multi-algorithm hashes, and verify file checksums with real-time comparison.

UUIDs & Unique IDs Cryptographic Hashes File Checksum & Verifier

UUID v4 (Random Crypto) UUID v7 (Time-Ordered 2026) NanoID (21 chars URL-Safe) ULID (Sortable Crockford) CUID2 (Collision Resistant)

Qty:

Uppercase Hyphens Braces { }

Generate Copy All

Input Text

0 chars, 0 bytes Load File

HMAC Key (Optional):

Output: Hex (lowercase) Hex (UPPERCASE) Base64

Drop any file to compute SHA-256, SHA-512, MD5 & CRC-32 checksums locally

100% Client-Side • Never uploaded to any server

Checksum Comparator Awaiting Input

QUICK PRESETS Reset

Identifier Presets

1x UUID v4 5x UUID v7 5x NanoID 5x ULID 10x UUID (UPPER) 5x CUID2

Hash Test Payloads

Hello World password123 Email Address Pangram Text

• UUID v7: RFC 9562 timestamp-ordered

• SHA-256/512: Hardware WebCrypto native

• 100% Offline: Zero telemetry, secure

Case & Text Transformation Utilities

Convert between camelCase, snake_case, PascalCase, kebab-case, CONSTANT_CASE, and more.

Input

Load

1

Case conversions

UPPERCASE

lowercase

Title Case

camelCase

PascalCase

snake_case

kebab-case

CONSTANT_CASE

OPTIONS

Stats

0 chars

0 no spaces

0 words

0 lines

Line Tools

Trim each line Remove duplicate lines Sort lines A-Z Remove empty lines

Clear

Regex Tester & Debugger

Live real-time regular expression tester with capture groups, visual highlighting, and common pattern presets.

Clear All

Pattern

/ /

Sample Text

Load

Highlighted Matches

Nothing to match yet

Matches (0)

No matches

OPTIONS

FLAGS

i — Case Insensitive m — Multiline s — Dot matches newline u — Unicode g — Global Match

COMMON PATTERNS

Email URL IPv4 Hex color Integer Whitespace UUID

Text & Code Diff Checker

Live real-time side-by-side comparison editor with syntax & character diffing.

Sample Diff ⇄ Swap Merge L→R Merge R→L ⛶ Fullscreen Clear

View:

Side-by-Side Stream A Stream B Unified

Filter:

All Lines Diffs Only Matches

Jump:

▲ Prev Diff ▼ Next Diff

+ 0 Added − 0 Removed ~ 0 Modified = 0 Unchanged

100% Match

A Stream A

B Stream B

Line Difference Inspector Cursor on Line 1

A >>

B >>

Unified Comparison Patch

Number Base & Bitwise Converter

Convert decimal, hexadecimal, binary, octal, and inspect 32-bit IEEE-754 floating point bits.

Decimal (Base 10)

Hexadecimal (Base 16)

Binary (Base 2)

Octal (Base 8)

Text (ASCII / UTF-8)

8-Bit Byte

Signed: - / Unsigned: -

16-Bit Word

Signed: - / Unsigned: -

32-Bit DWord

Signed: - / Unsigned: -

Bitwise 32-Bit Representation

Enter a number to visualize bits

QUICK PRESETS Reset

Integer Limits

255 (8-bit) 65,535 (16-bit) Int32 Max UInt32 Max

Memory / Powers of 2

256 B 1 KB 64 KB 1 MB 16 MB 1 GB

Magic Constants

0xDEADBEEF 0xCAFEBABE 0xBAADF00D 0xDEADC0DE

Color Converter & Palette Studio

Convert color formats, extract palettes from images via drag & drop, design gradients, and test WCAG contrast.

Eyedropper Random Color

Converter & Harmonies 📸 Image Palette Extractor 🌈 Gradient Studio 👁️ WCAG & Vision

H (Hue)258°

S (Saturation)90%

L (Lightness)66%

Color Formats & Instant Exports Click any code to copy

HEX

RGB

RGBA

HSL

HSV / HSB

hsv(258, 63%, 96%)

CMYK

cmyk(43%, 63%, 0%, 4%)

CSS Custom Property

--color-primary: #8b5cf6;

Tailwind Class

bg-[#8b5cf6]

Color Harmonies (Click any swatch to apply)

Tints & Shades (Lightness Progression)

SWATCH HISTORY

CURATED PALETTES

Random Color Reset Default

📸 Image Color Palette Extractor

Drag & drop any photo or image to extract color swatches. Reorder swatches by dragging!

Load Sample Image

Drop an image here or click to browse

PNG, JPG, WebP, SVG supported • Fast client-side quantization

Extracted Palette (6 Colors) Drag to reorder

Export as CSS Variables Export for Tailwind Config Export Palette JSON

🌈 Interactive CSS Gradient Studio

Linear Radial Conic

Angle: 135°

Random Gradient

Gradient Color Stops + Add Color Stop

background: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%); Copy CSS

WCAG Accessibility Contrast Audit

Swap Foreground/Background

Contrast Ratio 4.23:1

The quick brown fox jumps over the lazy dog

Demonstrating readability contrast against current background color.

AA Normal Text

Req: 4.5:1 (PASS)

AA Large Text

Req: 3:1 (PASS)

AAA Normal Text

Req: 7:1 (FAIL)

AAA Large Text

Req: 4.5:1 (FAIL)

Colorblindness Vision Simulation

Cron Expression Explainer & Predictor

Translate cron expressions into human English and predict trigger execution dates.

Cron Expression

Next 5 Runs

OPTIONS

Presets

Every minute Every 15 minutes Every hour Daily at midnight Daily at 9am Every Monday at 9am First of the month

Actions

Clear

History

Clear history

Secure Password Generator

Cryptographically secure random passwords with NIST entropy analysis.

Generated Password Ready

Click "Generate Password" below

Generate Password Copy to Clipboard

Strength: Strong

Crack time: ~Centuries 128 bits entropy

Alternative Passwords (4 Sets) 1-click copy individual password

Quick Presets

PIN (6) Easy (16) Strong (24) Ultra (32) Max (64)

Options & Rules

Length 16

Lowercase (a–z)

Uppercase (A–Z)

Numbers (0–9)

Symbols (!@#$%...)

Exclude ambiguous (lI1O0)

Document & Folder Keyword Analyzer

Filter and deep-search DOCX, PDF, CSV, and text files (or an entire folder) for keywords, patterns, and stats.

Clear All

Keywords — press Enter or comma to add

Any All 70%+

Drag & drop more files here, or click to browse

OPTIONS

Import

Files Folder

Clear All

Filters

Match mode: Any keyword
Keyword matching tolerates typos (~70% similarity)

Stats

0

total

0

PDF

0

DOCX

filename.pdf

0 KB

×

+ Add

Preview Extracted Text JSON

Client-Side PDF Suite

Merge, split, compress, and convert images to PDF 100% locally in your browser.

Merge Split Image → PDF Compress

Drag & drop two or more PDFs here, or click to browse

They'll be merged in the order you add them — reorder before merging.

HTML Editor & Live Sandbox

Instant execution sandbox for HTML, CSS, JavaScript, and query scripts.

HTML CSS JS

1

Live Preview

Run Open in Tab

P Element Inspector

×

Display block inline-block flex grid inline none

Color

Background

Font family

Font size

Weight 300 400 600 700 800

Text align

left center right justify

Console Clear

No console output yet — logs, warnings, and errors from the preview will appear here.

OPTIONS

Preview

Auto-refresh

Viewport width

Desktop Tablet Mobile

Actions

Download Combined HTML Clear Edits Load Sample Clear All