Pure Deterministic Tools for Demanding Craftsmen.
Kitiverse delivers rigorous, air-gapped instruments engineered for demanding workflows. Mathematical conversions, serialization, and document manipulation executed directly in your browser without cloud dependencies.
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Code & Token Engineering
Deterministic data parsers, cryptographic validators, and serializers.
Color Picker & Palette Generator
Multi-format color conversion (HEX, RGB, HSL, OKLCH), instant WCAG 2.1 accessibility contrast calculation, and harmonic pastel chalk palette generation.
JSON Formatter & Validator
Prettify, validate, and minify JSON payloads in real time with line-by-line syntax error diagnostics. 100% registration-free, zero account walls, private client-side compute, local device storage.
JWT Parser & Debugger
Decode, inspect, and verify JSON Web Tokens (JWT) client-side in real time. Features human-readable expiration countdowns, standard claims analysis, Web Crypto HMAC verification, and 100% zero-telemetry privacy.
WCAG 2.1 Color Contrast Checker
Verify foreground and background color pairs against W3C WCAG 2.1 AA and AAA accessibility thresholds with live typography and UI component previews.
HEX, RGB, HSL & CMYK Color Converter
Bidirectional 24-bit color code converter translating between hexadecimal (#RRGGBB), CSS RGB/RGBA, cylindrical HSL, and subtractive print CMYK.
Base64 & Base64URL Encoder / Decoder
RFC 4648 Base64 and URL-safe Base64URL encoder and decoder with native multi-byte UTF-8 Unicode support and Data URI formatting.
CSS Fluid Typography & Type Scale Generator
Calculate harmonious modular font hierarchies and zero-breakpoint CSS clamp() fluid typography variables that scale smoothly from mobile to desktop.
UUID v4, UUID v7 & ULID Generator
Cryptographically secure RFC 9562 UUID v4, time-ordered UUID v7, and Crockford Base32 ULID bulk generator and timestamp decoder.
Document, Image, Video & Audio Studio
In-browser PDF assembly, image compressors, video frame trimmers, and Web Audio DSP processors.
PDF Organizer & Splitter
Organize, reorder, rotate, split, and merge PDF pages directly in your browser. Features visual thumbnail reordering, custom page range extraction, multi-document merging, and 100% private zero-upload processing.
Image to PDF Converter
Convert JPG, PNG, WebP, GIF, and BMP images into high-resolution, vector-crisp PDF documents. Features visual reordering, 90° rotation, page margin controls, A4 and US Letter sizing, and 100% private zero-upload processing.
Video to GIF Converter
Convert MP4, WebM, QuickTime MOV, and OGV videos into high-quality animated GIFs directly in your browser. Features precision range trimming, custom frame rates (10–24 FPS), multi-resolution scaling (240p to 720p), and 100% private client-side processing with zero server uploads.
Audio Converter
Convert MP3, WAV, M4A, AAC, and OGG sound files online. Features studio-grade sampling rate conversion (44.1 kHz to 48 kHz), stereo-to-mono downmixing, and 100% private in-browser processing with zero cloud uploads.
Audio Equalizer
Adjust audio frequency bands online with a 5-band graphic equalizer. Boost bass, enhance vocal presence, cut rumble, and export to WAV or M4A with zero cloud uploads.
Audio Joiner
Merge and combine multiple audio files online into a single continuous track. Customize track order, silence gaps, and export to WAV or M4A with zero server uploads.
Audio Reverser (Play Sound Backwards Online — MP3, WAV)
Reverse audio files online backwards directly in your browser. Audition reversed sound effects and export to WAV or M4A with zero server uploads.
Audio Silence Remover
Automatically detect and remove dead air, long pauses, and silent gaps from podcasts, voice memos, and lectures online. 100% private in-browser compute with instant WAV export.
Audio Speed Changer
Speed up or slow down audio online from 0.25x to 4.0x directly in your browser. Real-time preview and export to WAV or M4A with zero server uploads.
Audio Stereo Panner & Width Widener (Mid/Side 3D Sound)
Adjust stereo balance, expand soundstage width with Mid/Side processing, and spatialize mono audio online. 100% private in-browser compute with instant WAV/M4A export.
Audio Tone & Frequency Generator (20 Hz – 20 kHz & Noise)
Generate pure sine, square, triangle, and sawtooth audio frequencies from 20 Hz to 20,000 Hz online. Features white and pink noise, live playback, and instant WAV export.
Audio Trimmer
Trim and cut MP3, WAV, M4A, AAC, and OGG audio files directly in your browser. Features an interactive visual waveform, click-free fade envelopes, millisecond timecode precision, and 100% private client-side processing.
Audio Volume Booster & Peak Normalizer (+dB MP3/WAV)
Boost and normalize quiet audio files online without digital clipping distortion. Features 1-click automatic peak normalization (-0.1 dBFS), custom gain amplification up to 300%, hyperbolic tangent soft-limiting, and 100% private in-browser compute.
Voice Recorder
Record clear voice notes and microphone audio directly in your browser. Export to uncompressed 16-bit WAV or high-efficiency M4A with zero server uploads.
Image Compressor (WebP, JPEG & PNG)
Compress PNG, JPEG, and WebP images directly in your browser with adjustable quantization quality, maximum edge downscaling, and live byte-savings telemetry.
Image Format Converter (WebP, PNG, JPG & SVG)
Convert images between WebP, PNG, JPEG, SVG, GIF, and BMP directly in your browser with custom background matte fill for transparent PNG/WebP to JPEG conversion.
Image Resizer & Aspect Ratio Calculator (Pixels, 16:9, 4:3)
Resize PNG, JPEG, and WebP images to exact pixel dimensions, lock aspect ratios with GCD simplification (16:9, 4:5, 1:1), and calculate 300 DPI print sizes locally.
PDF Bates Numbering & Legal Exhibit Stamper
Apply sequential zero-padded Bates numbers, case prefixes, confidentiality designations, and exhibit stamps across PDF pages locally in your browser.
PDF Cropper & Margin Trimmer
Trim blank white margins from PDF documents using one-click presets or independent Top, Bottom, Left, and Right coordinates in your browser.
PDF Form Flattener
Convert fillable AcroForm fields, checkboxes, dropdowns, and markup annotations into permanent static page graphics directly in your browser. 100% private.
PDF Grayscale & B&W Converter
Convert RGB and CMYK color PDF documents into crisp ITU-R BT.601 grayscale or high-contrast monochrome directly in your browser.
PDF Merger & Page Range Combiner
Combine multiple PDF documents into a single file, cherry-pick custom page ranges (e.g., 1-3, 5) from each source PDF, and merge 100% locally in your browser.
PDF Metadata Editor & Sanitizer
View, edit, and sanitize hidden Document Information Dictionaries and tracking metadata in PDF documents directly in your browser. 100% private and zero uploads.
PDF Booklet & N-Up Imposition
Combine 2, 4, 6, or 9 PDF pages onto a single A4, US Letter, Legal, or A3 sheet with proportional scaling, cell borders, and dashed cut guides.
PDF Page Numberer & Stamper
Add page numbers, headers, footers, and legal Bates stamps to PDF documents directly in your browser. Supports multiple number formats, 6 alignment positions, cover page skipping, and 100% private client-side processing.
PDF Redactor & Blackout Sanitizer
Permanently scrub Social Security Numbers, emails, phone numbers, credit cards, and custom text from PDF streams while drawing opaque blackout zones.
PDF Page Resizer
Convert and scale PDF page dimensions to A4, US Letter, Legal, A3, A5, Tabloid, or custom paper sizes directly in your browser. 100% private.
PDF to Excel Converter
Extract multi-column tables, financial ledgers, invoices, and schedules from PDF documents into editable Microsoft Excel (.xlsx) workbooks.
PDF to Word Converter
Convert PDF documents into editable Microsoft Word (.docx) and plain text manuscripts locally in your browser with automatic heading and paragraph reconstruction.
PDF Watermark & Stamp Adder
Add custom text stamps or company logo watermarks to PDF files directly in your browser. Features rotation angles, opacity control, 5-point alignment, custom page targeting, and 100% private client-side processing.
Word to PDF Converter
Convert Microsoft Word (.docx) documents and plain text manuscripts into formatted vector PDF files locally in your browser with customizable page geometry, margins, and typography.
Screen Recorder
Record your screen, browser tabs, or application windows with audio online. 100% private in-browser screen capture with no watermarks or cloud limits.
Video Compressor
Compress large MP4, WebM, and MOV video files to exact target sizes (8 MB for Discord, 25 MB for Email/Slack, or custom MB). Powered by client-side WebCodecs with zero server uploads, 100% private compute, and automatic spatial downscaling.
Video Converter
Convert MP4, WebM, and QuickTime MOV videos directly in your browser. Powered by 100% client-side hardware-accelerated WebCodecs with zero server uploads, zero file size limits, and instant local processing.
Video Cropper
Crop video files online to 9:16 for TikTok and Reels, 1:1 for Instagram, or custom aspect ratios directly in your browser. Fast, 100% private, zero server uploads.
Video Frame Extractor
Extract full-resolution image frames and screenshots from MP4, MOV, and WebM videos online directly in your browser. Single-frame and burst capture to PNG or JPG with zero server uploads.
Video Audio Remover
Remove audio and sound tracks from MP4, MOV, and WebM videos online directly in your browser. Fast, 100% private, and zero server uploads.
Video Rotator
Rotate and flip videos online by 90, 180, or 270 degrees directly in your browser. Correct sideways smartphone recordings and mirror videos with zero server uploads.
Video Speed Changer
Speed up or slow down videos online from 0.25x slow-mo to 4.0x timelapses directly in your browser. Real-time preview and export to MP4 or WebM with zero server uploads.
Video to Audio Extractor
Extract crystal-clear audio from MP4, WebM, and MOV video files directly in your browser. Output uncompressed studio WAV (16-bit PCM) or compact M4A (AAC) with instant client-side Web Audio decoding and zero server uploads.
Video Trimmer
Trim and cut MP4, WebM, and MOV videos online with millisecond frame precision. Features an interactive dual-handle timeline scrubber, instant clip loop preview, zero watermarks, and 100% private in-browser processing.
Video Watermark
Add logos, copyright text, and branding watermarks to MP4, MOV, and WebM videos online. 100% private in-browser video compositing with zero cloud uploads.
Precision Metrics, Scales, Compliance & Content
SI-standard dimensional converters, PERT complexity scales, IHSS/FLSA overtime calculators, and text diff engines.
Length & Distance Converter
Universal multi-unit length and distance converter. Seamlessly convert between kilometers, meters, centimeters, millimeters, micrometers, nanometers, miles, yards, feet, inches, and nautical miles with instant precision.
Text Diff Checker
Side-by-side and unified inline text comparison. Character-level precision offloaded to client workers with zero server uploads.
Cosmic & Dimensional Scale Comparator
Compare subatomic, terrestrial, planetary, stellar, and cosmological distances across 42 orders of magnitude with logarithmic ratios, light-travel time, and physical scale models.
Architectural & Model Scale Converter
Convert real-world dimensions to scaled blueprint drawings and miniature models (1:12, 1:24, 1:48, 1:50, 1:87 HO, 1:100) across metric (mm, cm, m) and imperial (in, ft) units.
Task Complexity & PERT Estimator
Calculate weighted PERT three-point time estimates (Optimistic, Most Likely, Pessimistic), standard deviation (σ), 95% confidence intervals, and Agile Fibonacci story points.
ANSI to Unicode & Unicode to ANSI Converter
Bidirectionally convert legacy 8-bit designer ANSI fonts (Armenian ARMSCII-8, Georgian AcadNusx, Cyrillic CP1251) and standard UTF-8 Unicode for Illustrator, Photoshop, Figma, and web publishing.
Arabic, Persian & Kurdish RTL Text Reshaper
Convert disconnected, reversed Arabic, Persian (Farsi), Kurdish, and Urdu text into connected Presentation Forms-B glyphs for DaVinci Resolve, Blender, Cinema 4D, and Adobe apps.
Case Converter & URL Slug Generator
Transform code identifiers, database columns, and headings across 10 naming conventions including camelCase, snake_case, kebab-case, and SEO URL slugs.
Kruti Dev, Preeti, Bijoy & VNI Font Converter
Bidirectionally convert South and Southeast Asian legacy DTP fonts—Hindi Kruti Dev 010, Nepali Preeti, Bengali Bijoy (SutonnyMJ), and Vietnamese VNI—to and from standard Unicode.
Mojibake Decoder & CJK Width Converter
Repair corrupted double-encoded UTF-8, Windows-1252, Cyrillic CP1251, and Greek ISO-8859-7 text strings, and convert East Asian CJK Full-Width and Half-Width characters.
Unicode Glyph Inspector & Font Styler
Inspect character code points (U+XXXX), UTF-8 byte sequences, HTML/CSS escapes, and invisible zero-width characters, or transform text across Mathematical Unicode font styles.
Word, Character & Byte Counter
Real-time lexical word counter, character and UTF-8 byte analyzer, reading/speaking duration estimator, and SEO keyword density inspector.
Word & Excel ANSI ↔ Unicode Converter
Batch-convert Microsoft Word (.docx) documents and Excel (.xlsx, .csv) spreadsheets between legacy 8-bit ANSI fonts (Armenian ARMSCII-8, Georgian AcadNusx, Cyrillic CP1251) and standard UTF-8 Unicode while preserving 100% of tables, formulas, and layout.
IHSS Timesheet & Overtime Calculator (Pay Period 1 & 2 Weekly Cap Check)
Calculate monthly authorized caregiver hours, weekly maximum caps (Monthly ÷ 4), daily care pacing, and semi-monthly Pay Period 1 (1st–15th) and Pay Period 2 splits.
Loan Payment & Amortization Schedule Calculator
Compute fixed monthly principal and interest installments, total borrowing costs, early payoff savings from extra payments, and annual amortization schedules.
Mortgage & Home Loan Calculator
Estimate total monthly homeownership costs including Principal, Interest, Property Taxes, Homeowners Insurance (PITI), HOA dues, LTV ratio, and 15-year vs. 30-year savings.
Overtime & Double-Time Pay Calculator
Calculate regular earnings, 1.5x time-and-a-half overtime, 2.0x double-time wages, total gross pay, and blended effective hourly rate.
Salary Calculator (Hourly ↔ Monthly, Biweekly & Annual Pay)
Bidirectionally convert pay rates across hourly, daily, weekly, bi-weekly, semi-monthly, monthly, and annual salary frequencies with customizable workweek hours.
Time Card Calculator (Weekly & 2 Weeks with Lunch Breaks)
Calculate daily and weekly work shift durations from clock-in and clock-out times, deduct unpaid meal breaks, and convert hours and minutes (HH:MM) to payroll decimal hours.
MPG to L/100km & km/L Fuel Economy Converter (US & UK MPG)
Convert fuel economy ratings between US MPG, UK MPG, Liters per 100 km (L/100km), and km/L with exact ISO physical constants.
PX to REM & Font Size Unit Converter
Bidirectionally convert CSS pixels (px), root ems (rem), relative ems (em), print points (pt), picas (pc), and percentages with live Tailwind CSS tokens.
Celsius to Fahrenheit (°C to °F) & Kelvin Converter
Thermodynamic temperature scale converter between Celsius (°C), Fahrenheit (°F), SI Kelvin (K), and engineering Rankine (°R).
Kilograms to Pounds & Ounces (kg to lbs & oz) Converter
Precision metrological mass converter translating between SI metric units (kg, g, mg, t), Imperial/US avoirdupois units (lb, oz, stone), and precious-metal troy ounces.
Hardware & Peripheral Diagnostics
Real-time hardware test benches for webcam, microphone, mechanical keyboard, mouse polling rate, display pixels, speakers, and gamepads.
Display, Dead Pixel & Refresh Rate (Hz) Tester
Comprehensive client-side display laboratory. Check dead and stuck pixels, OLED true black uniformity, measured refresh rate in Hz, and optical strobe motion persistence.
Gamepad & Controller Drift Tester
Comprehensive client-side gamepad diagnostic apparatus. Test thumbstick deadzones, circularity error, analog trigger linearity, and vibration rumble.
Keyboard & Key Chatter Tester
Interactive visual keyboard matrix diagnostic apparatus. Test N-Key Rollover chords, detect mechanical switch chatter bounce, and audit actuation speed.
Mouse Polling Rate & Switch Tester
Interactive mouse and touchpad diagnostic apparatus. Measure real-time sensor polling rate in Hz, detect microswitch double-click bounce, and test scroll jitter.
Touch Screen & Multi-Touch Tester
Comprehensive client-side touchscreen and digitizer diagnostic apparatus. Test 10-finger multi-touch tracking, dead-zone grid sweeps, and stylus contact pressure.
Video DRM, Hardware Codec, HDR & PiP Inspector
Comprehensive client-side video HAL diagnostic studio. Query W3C EME DRM protection tiers, GPU hardware decoding for AV1, HEVC, VP9, and test Picture-in-Picture.
Webcam & Microphone Hardware Diagnostic Studio
Comprehensive client-side camera and microphone testing laboratory. Verify native sensor resolution, measured FPS, exposure balance, dBFS VU metering, and private loopback.
Popular Precision Presets & Specialized Calculators
Instant 1-click execution for 65 high-demand workflows: legal PDF document sizing, financial amortization schedules, and scientific unit conversions.
Resize PDF to A4 Size Online
Resize PDF to US Letter Size Online
Resize PDF to US Legal Size Online
Resize PDF to A5 Booklet Size Online
Convert JPG to PDF A4 Online
Convert PNG to PDF US Letter Online
Merge Expense Receipts into Single PDF
Extract First Page from PDF Online
Split PDF into Single Pages Online
Compress Image to 50KB Online
Compress Image to 100KB Online
Resize Photo to 2x2 Inches for Passport
Resize Image to 1920x1080 Full HD Online
Resize Image to 1080x1080 Square Online
30-Year Fixed Mortgage Payment Calculator
60-Month Auto Loan Payment & Payoff Calculator
15-Year Fixed Mortgage Payment Calculator
FHA Mortgage Payment Calculator (3.5% Down)
Extra Mortgage Payment & Early Payoff Calculator
72-Month Auto Loan Payment & Payoff Calculator
Personal Loan Payment & Debt Consolidation Calculator
Student Loan 10-Year Repayment & Extra Payoff Calculator
Hourly to Salary & Annual Pay Calculator
Biweekly Paycheck to Annual Salary Calculator
Time and a Half (1.5x) Overtime Pay Calculator
Double Time (2.0x) Premium Pay & Overtime Calculator
IHSS 66-Hour Weekly Maximum Cap Timesheet Calculator
IHSS 70:45 Maximum Weekly Hours & 283-Hour Monthly Cap Calculator
8-Hour Shift with 30-Minute Lunch Time Card Calculator
Redact SSN and PII from PDF Documents Online
Add Confidential Diagonal Watermark to PDF Online
Add Page X of Y Bates Numbering to PDF Online
Print 2 Pages per Sheet (2-Up) PDF Imposition Online
Crop PDF Margins for Kindle & E-Reader Screens Online
Lock and Flatten PDF Form Fields Online
Kilometers to Miles (km to mi) Distance Converter
Centimeters to Inches (cm to in) Length Converter
Kilograms to Pounds (kg to lbs & oz) Converter
Celsius to Fahrenheit (°C to °F) & Kelvin Converter
US & UK MPG to Liters per 100 km (L/100km) Converter
Image Aspect Ratio Changer & Proportions Calculator
Annual Loan Payment Calculator & Debt Service
Used Car Loan Calculator & Payment Estimator
Loan Overpayment Calculator & Interest Savings
Annuity Loan Payment Calculator & Amortization
Auto Loan Amortization Schedule Calculator
8-Hour Shift Timesheet Calculator with Breaks
YouTube Banner 2048x1152 Image Resizer Online
MP3 to 44100 Hz Sample Rate Audio Converter
Kelvin to Fahrenheit Temperature Converter
Auto Loan Refinance & Payoff Savings Calculator
20-Year Fixed-Rate Mortgage Payment Calculator
FHA 3.5% Down Payment Home Loan Calculator
Double-Time & Overtime Premium Pay Calculator
Part-Time 20-Hour Weekly Salary & Pay Calculator
Convert OGV Video to Animated GIF Online
Reverse MP3 Audio Online — Backwards Sound Player
Side-by-Side Code & Text Diff Comparison Checker
Fix Garbled Cyrillic Text & CP1251 Mojibake Online
Pounds to Kilograms (lbs to kg) Weight Converter
Redact SSN and PII from PDF Documents Online
Extract PDF Bank Statements to Excel Spreadsheet
Convert PDF Legal Contracts to Editable Word (DOCX)
Bates Stamp Legal Discovery PDF Documents Online
Commercial Equipment Loan & Financing Calculator
Subsystem Taxonomies & Disciplines
Client-Side Compute Architecture, Metrological Rigor & Editorial Governance
1. Air-Gapped In-Browser Memory Execution
Unlike legacy utility portals that upload confidential files to remote cloud queues, all 80 specialized instruments and 42 pre-calibrated workflow presets on Kitiverse execute entirely inside your local browser runtime using WebAssembly, Web Audio API, HTML5 Canvas, WebCodecs, and TypedArrays. Whether you are splitting a multi-hundred-page legal PDF filing, batch-compressing studio imagery, inspecting a cryptographic JWT payload, or running real-time hardware peripheral diagnostics, your files and data structures remain strictly in your device RAM with 0 ms network roundtrip latency.
2. International Metrological Traceability (NIST, BIPM & ISO)
Every computational engine on Kitiverse is continuously verified against an automated Vitest quality assurance harness. Our dimensional and scientific converters are directly traceable to International Bureau of Weights and Measures (SI / BIPM) base definitions and NIST Handbook 44 statutory tables, utilizing IEEE 754 double-precision scaling safeguards to eliminate floating-point drift. Document engines adhere strictly to open ISO 32000-1 and ISO 32000-2 PDF specifications, while payroll and compliance calculators enforce statutory FLSA overtime rules and California DLSE/IHSS rounding schedules.
3. Open Technical Documentation & Field Engineering Guides
Kitiverse eliminates opaque black-box calculators. Every published instrument pairs an interactive above-the-fold apparatus with server-rendered KaTeX mathematical derivations, verified benchmark reference tables, real-world production traps to avoid, mental estimation shortcuts, and comprehensive technical FAQs authored natively across four languages (English, Spanish, French, and Russian). Engineers, students, and analysts can verify both the immediate output and the underlying formulaic assumptions on a single page.
4. Core Web Vitals Engineering & Universal Accessibility
Architected on Astro 5 static islands and delivered across 330+ Cloudflare Edge locations worldwide, Kitiverse achieves sub-200ms global Time to First Byte (TTFB) and strict zero Cumulative Layout Shift (0.000 CLS) across compact mobile viewports (360px–430px) and ultra-wide desktop workstations (2560px+). Every utility is 100% free with zero registration walls or account subscriptions. Learn more in our About Kitiverse Manifesto, Privacy Policy, Terms of Service, or reach our engineering desk via Contact & Support.