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Own your tools. Own your data.
357 privacy-first utilities that run entirely in your browser — no uploads, no signup, no tracking. 286 are live now, and they keep working with the Wi-Fi off. Bring your own AI key or run heavy tools in your own cloud — nothing ever touches our servers.
357 tools · 286 live
Part of the Demystify suite
One governed, AI-ready operating system — Decode · Design · Deliver. These tools power every product below — and they're free for anyone.
ASHR.workHR & payroll operating systemashr.work ↗
FinocketBooks, GST, invoicing & financefinocket.com ↗
Mysty PieThe Mysty AI agent & platformdemystipai.com ↗
MiatzAI-era engineering institute & the tools build-labmiatz.com ↗
ArkivoOwn your call recordings & compliancearkivo.ai ↗
FleetonomicsFleet, fuel & trip economicsfleetify ↗
JewellersJewellery POS, gold & GSTjewellers.demystifysystem.com ↗
AI Assistants14
- Contract explainer
Clauses in plain language — not legal advice
- Cron generator
Plain English to cron
- Document translator
Business docs EN to HI/TA/TE/KN
- Email drafter
Situation to professional email
- Excel formula generator
Describe to formula; also explains pasted formulas
- JD writer
Role inputs to job description
- JSON schema from description
Types and schemas from prose
- Meeting notes to minutes
Transcript to decisions and actions
- Mock data from description
'50 Indian customer records' to CSV
- Product description writer
For catalogs and marketplaces
- Regex generator
Describe the pattern, get regex plus tests
- Resume bullet improver
Achievements to strong bullets
- Social caption writer
Post plus hashtags by platform
- SQL generator
Question plus schema to query, explained
Business & Finance (India)44
- Age calculator
DOB to exact age for forms and HR
- Average calculator
Mean, median, mode
- Business days calculator
Skip weekends and Indian holidays
- Countdown maker
Shareable event countdown
- Date difference
Days, weeks, months between dates
- Date plus N days
Deadlines and notice periods
- Discount calculator
Price after percent off, GST-aware
- Fuel cost calculator
Trip cost at Indian prices
- Loan comparison
Two EMIs side by side
- Mileage calculator
km/l from odometer and fuel, cost per km
- Percentage calculator
Percent of, increase, difference
- Ratio calculator
Scale quantities up and down
- Timesheet calculator
Hours times rate, weekly totals
- Trip cost splitter
Fuel plus tolls split among riders
- Unit converter
Length, weight, temperature, area including bigha and guntha
- 44ADA presumptive calculator
Freelancer tax under the presumptive scheme
- Advance tax planner
Quarterly due dates and amounts
- Cheque validity calculator
Three-month validity dates
- Currency converter
Live INR rates, edge-cached daily
- E-invoice QR decoder
Decode IRN QR payloads
- EMI calculator
Amortization schedule with prepayment
- FD/RD calculator
Maturity plus TDS on interest
- Freelancer rate calculator
Target income to hourly and day rates
- Gold making-charges calculator
Rate x weight + making percent + 3 percent GST, itemized
- Gold purity converter
Karat to fineness (22K = 916), value by purity
- Gold rate tracker
Daily 22K/24K city rates, edge-cached
- GST calculator
Inclusive and exclusive, CGST/SGST/IGST split
- GST late fee calculator
Late fee plus interest by return type
- GST state codes
01-38 list with instant lookup
- GSTIN validator
Format, checksum, state decode
- HSN/SAC finder
Search codes with GST rates
- IFSC lookup
Bank and branch from IFSC and reverse
- Income tax calculator
Old vs new regime comparison
- Invoice generator
GST-compliant PDF invoice, no signup
- Jewellery GST calculator
3 percent on gold plus 5 percent on making, split correctly
- PAN validator
Format check plus holder-type decode
- PIN code lookup
Area to PIN and back
- PPF calculator
15-year projections
- Professional tax lookup
State-wise PT slabs
- Quotation maker
Estimate and proforma PDFs
- SIP calculator
SIP, lumpsum, CAGR, XIRR
- TDS calculator
Section-wise rates: 194C, 194J, 194I and more
- UPI payment link
upi:// deep links for invoices and chats
- UPI QR generator
VPA plus amount to printable QR
Content & Design29
- Avatar generator
Initials and identicon avatars, bulk
- Border radius / blob maker
Organic shapes and squircles
- Chart maker
Paste CSV, get a clean bar/line/pie, export PNG/SVG
- Clip-path maker
Visual CSS shapes
- Color blindness simulator
Preview designs under CVD
- Color converter
HEX, RGB, HSL, OKLCH, CMYK
- Contrast checker
WCAG AA/AAA plus APCA
- Diagram editor
Mermaid and flowchart live editor
- Easing previewer
cubic-bezier playground
- Font pairing previewer
Test Google Fonts combinations
- Gradient generator
CSS and SVG gradients
- Palette generator
Harmonies, lock and shuffle, export tokens
- Shadow generator
Layered CSS shadows
- Tailwind shade generator
Brand color to a 50-950 scale
- Type scale calculator
Modular scales with live preview
- Amount to words
Rupees to words, English and Hindi, cheque-ready, lakh/crore
- Business email templates
Payment reminders, follow-ups, escalations
- Character limit checker
X, LinkedIn, SMS, WhatsApp, meta-description lengths
- Duplicate finder
Duplicate words and lines in lists
- Grammar checker
Fixes with Indian-English awareness
- Indian number formatter
Lakh/crore to million/billion and back
- Paraphraser
Rewrite for tone and clarity
- Readability scorer
Flesch, grade level, long-sentence flags
- Reading time calculator
Words to minutes, reading and speaking
- Remove line breaks
Clean text pasted from PDFs
- Text summarizer
Long text to key points
- Title case converter
AP, Chicago, sentence styles
- Translator
EN to HI/TA/TE/KN business text
- Word counter
Words, characters, sentences plus platform limits
Data27
- Column statistics
Paste a column, get sum/avg/median/outliers
- CSV cleaner
Trim, dedupe rows, fix quoting and encoding
- CSV joiner
SQL-style join of two CSVs on a key
- CSV splitter
Split big CSVs by rows or size
- CSV to Markdown table
Also HTML tables
- CSV to SQL
Generate CREATE TABLE and INSERTs
- CSV viewer/editor
Spreadsheet-style grid in the browser
- Data anonymizer
Mask PII columns before sharing
- Data profiler
Column types, nulls, uniques, distributions
- Delimiter converter
CSV / TSV / pipe / semicolon
- JSON diff
Structural compare of two JSON documents
- JSON formatter
Format, validate, tree view, precise error pointer
- JSON minifier
Strip whitespace for payloads
- JSON Schema generator
Infer a schema from sample JSON
- JSON Schema validator
Validate payloads against a schema
- JSON to CSV
Flatten nested JSON to CSV and back
- JSON to TOML
Config format conversion
- JSON to XML
Two-way convert
- JSON to YAML
Two-way convert
- JSONL tools
Line-delimited JSON to JSON/CSV and back
- JSONPath / jq playground
Query JSON interactively
- Markdown table editor
Visual editor that outputs aligned MD
- Mock data generator
Schema to realistic fake CSV/JSON with Indian locale (names, phones, PAN, GSTIN)
- Parquet viewer
Open and convert Parquet files in-browser
- SQL formatter
Pretty-print or minify SQL
- SQL playground
SQLite/DuckDB in the browser; query uploaded CSVs
- Transpose table
Swap rows and columns
Developer65
- API key generator
Random keys with prefixes and entropy choices
- Basic auth header generator
user:pass to header value
- CORS tester
Diagnose cross-origin failures
- GraphQL playground
Point at an endpoint, introspect, query
- Mock API builder
Define JSON responses, get live endpoints
- OpenAPI mock server
Spec in, fake API out
- Postman to code
Collections to cURL and scripts
- REST client
Postman-lite in a tab; collections stored locally
- Webhook inbox
Temporary URL that captures callbacks
- WebSocket tester
Connect, send, log frames
- .env to JSON/YAML
Config format transforms
- .gitignore generator
By language and stack
- API spec generator
Describe endpoints in plain language, get valid OpenAPI 3.1 YAML
- Chmod calculator
Permissions to octal and back
- Code screenshot
Pretty, brandable snippet images
- CSS formatter
Beautify and minify CSS
- cURL to code
fetch, axios, Python requests, Go, PHP
- Diff to patch
Create and apply unified patches
- docker run to compose
Convert commands to compose files
- GraphQL formatter
Format queries, view schemas
- HAR analyzer
Inspect browser network exports
- HTML formatter
Beautify and minify HTML
- HTML to JSX
React-ready markup conversion
- HTML to Markdown
Two-way conversion
- JS/TS formatter
Beautify and minify JavaScript / TypeScript
- JSON to any language
Go, Rust, Kotlin, Java, Python, C# types
- JSON to TypeScript
Interfaces from sample JSON
- MCP server generator
Describe your tools or paste an OpenAPI spec, get server.json plus a working MCP scaffold
- OpenAPI viewer
Validate and render specs, try requests
- px to rem converter
With configurable base size
- SVG to React component
JSX/TSX output with props
- XML formatter
Pretty-print and validate XML
- YAML formatter
Format and validate, k8s-friendly
- AES encrypt/decrypt
Password-protect text and files locally
- Base64 encode/decode
Text and files, URL-safe variant
- Bcrypt generator
Hash and verify with cost factor
- Byte size converter
KB/MiB/GB plus transfer-time estimates
- Case converter
camelCase, snake_case, kebab-case, Title Case and more
- Cron builder
Build and explain cron, next 10 runs, IST-aware
- Epoch converter
Unix time to human and back, ms/s, timezones
- File checksum verifier
Confirm a download matches its published hash
- Hash generator
MD5 / SHA-1 / SHA-256 / SHA-512 for text and files
- HMAC generator
Keyed hashes for webhook signatures
- HTML entity converter
Escape and unescape entities
- Invisible character detector
Find zero-width and homoglyph characters
- JWT decoder
Decode header/payload, verify signatures
- JWT generator
Create signed test tokens
- Line tools
Sort, dedupe, reverse, number, shuffle lines
- Lorem ipsum
Words, paragraphs, bytes
- Number base converter
Binary, octal, decimal, hex
- Passphrase generator
Diceware-style memorable phrases
- Password generator
Rules, pronounceable mode, bulk
- Random pickers
Numbers, strings, list shuffler, dice
- Regex find & replace
Multiline regex replace on pasted text
- Regex tester
Live highlighting, groups, cheatsheet beside
- RSA key generator
Key pairs via WebCrypto
- Slug generator
URL-safe slugs with Indic transliteration
- String escaper
JSON / SQL / shell / regex escaping
- Text diff
Line, word and character diff with merge view
- Timezone meeting planner
Compare cities, share a link
- TOTP generator
2FA codes from a secret, fully client-side
- ULID / NanoID generator
Modern sortable ID formats
- Unicode inspector
Codepoints, names, normalization
- URL encode/decode
Percent-encoding both ways
- UUID generator
v4/v7, bulk, multiple formats
Documents51
- CSV to styled Excel
CSV to a formatted XLSX
- EPUB to PDF
Ebook conversions both ways
- Excel to CSV
XLSX to CSV and back, per-sheet
- Excel to JSON
Sheets to JSON, headers become keys
- LaTeX to PDF
Compile LaTeX fully in the browser
- Legacy office converters
ODT / RTF / ODS to modern formats
- Letterhead maker
Company letterhead template to PDF
- Markdown to HTML
Two-way convert with live preview
- Markdown to Word
MD to DOCX, pandoc-style
- Merge Excel files
Combine workbooks and sheets
- PowerPoint to images
Slides as PNGs for docs and social
- Resume builder
Form in, clean ATS-safe PDF out
- Subtitle converter
SRT / VTT / TXT with timing shift
- Word template filler
CSV + DOCX template to filled documents (mail merge)
- Word to HTML/Markdown
DOCX to clean HTML or Markdown
- Add page numbers
Position, format, start-from-N
- Bates numbering
Sequential legal document numbering
- Booklet / N-up
Impose pages for print layouts
- Compare PDFs
Visual plus text diff of two versions
- Compress PDF
Shrink file size with quality presets
- Crop PDF
Trim margins, resize page box
- Excel to PDF
Spreadsheets to clean PDF
- Extract images from PDF
Save all embedded images
- Extract pages
Pull selected pages into a new PDF
- Extract tables from PDF
Detect tables and export CSV/XLSX
- Extract text from PDF
Pull plain text out
- Fill PDF forms
Fill AcroForms, save or flatten
- Flatten PDF
Bake forms and annotations into static pages
- Grayscale PDF
Strip color for cheap printing
- HTML to PDF
Paste HTML or a URL, get a pixel-accurate PDF
- Images to PDF
Photos and scans into a single PDF
- Markdown to PDF
Styled PDF from Markdown
- Merge PDFs
Combine many PDFs into one, reorder before saving
- Organize pages
Reorder, delete, insert pages visually
- PDF metadata editor
View and edit title, author, keywords
- PDF OCR
Make scanned PDFs searchable, Indic scripts included
- PDF to Excel
Extract tables from PDF into XLSX/CSV
- PDF to JPG/PNG
Render pages as images
- PDF to PDF/A
Archival format for compliance
- PDF to Word
Convert PDF to editable DOCX
- PowerPoint to PDF
Slide decks to PDF
- Protect PDF
Add open/permission passwords (AES)
- Redact PDF
True content removal, not black boxes
- Repair PDF
Recover corrupted files
- Rotate PDF
Fix page orientation
- Scan to PDF
Phone camera to deskewed, cleaned PDF
- Sign PDF
Draw, type or upload a signature and place it
- Split PDF
Split by page range, every N pages, or bookmarks
- Unlock PDF
Remove a password you already know
- Watermark PDF
Text or image stamp, single or tiled
- Word to PDF
DOCX to print-ready PDF
HR & Payroll (India)16
- Appointment letter generator
Standard India formats
- CTC to in-hand calculator
Monthly take-home after PF, PT, tax
- EPF calculator
Contributions plus interest projection
- ESI checker
Eligibility and contribution amounts
- Experience letter generator
Relieving and experience formats
- F&F settlement estimator
Full and final components
- Gratuity calculator
Eligibility and amount
- Holiday calendar
State-wise India holidays by year
- HRA exemption calculator
Metro and non-metro, rent, exemption math
- In-hand to CTC
Reverse calculation for offers
- Leave encashment calculator
Per-policy inputs
- Notice period calculator
Last working day including holidays
- Offer letter generator
Template to branded PDF
- Salary hike calculator
Percent hike to new CTC and back
- Salary slip generator
Payslip PDF from CTC inputs
- Team cost calculator
Hiring plan to monthly burn
Images & Media46
- Audio converter
MP3, WAV, AAC, OGG, FLAC
- Audio trimmer
Cut and fade clips for ringtones and reels
- Audio waveform image
Podcast and social visuals
- Auto subtitles
On-device Whisper for short clips
- Extract audio
Video to MP3 or WAV
- GIF to MP4
Lighter autoplaying video
- Mute video
Strip the audio track
- Screen recorder
Record tab or screen, no install
- Speed changer
0.5x to 2x, pitch-corrected
- Text to speech
Natural voices including Indian English and Hindi
- Video compressor
Target size or bitrate
- Video converter
MP4, WebM, MOV, MKV in the browser
- Video merger
Concatenate clips
- Video thumbnail grabber
Frame at timestamp to image
- Video to GIF
Clip to optimized GIF
- Video trimmer
Cut without re-encoding where possible
- Voice recorder
Mic to MP3
- Volume normalizer
Level audio across clips
- Webcam recorder
Quick talking-head clips
- Background remover
On-device AI cutouts
- Bulk image tools
Batch convert, resize, rename
- Color picker from image
Eyedropper plus auto palette
- Crop image
Freeform plus aspect presets
- EXIF remover
Strip metadata for privacy
- EXIF viewer
All metadata including GPS
- GIF maker
Images or clips to optimized GIF
- HEIC to JPG
iPhone photos to shareable JPG
- Image compressor
Compress to a target size, e.g. under 100KB for portals
- Image converter
JPG, PNG, WebP, AVIF, GIF, BMP, TIFF
- Image diff
Pixel and structural compare
- Image OCR
Photo or screenshot to text, Indic scripts included
- Image resizer
Pixels, percent, presets, DPI
- Image splitter
Grid slices for Instagram
- Image to Base64
Data URLs for embedding
- Image upscaler
2x / 4x enhancement
- Palette extractor
Dominant colors, export as tokens
- Passport photo maker
India specs 35x45mm, background color, print sheet
- Placeholder generator
Dummy images and avatars by size
- Redact image
Blur or pixelate regions before sharing
- Rotate / flip image
Quick orientation fixes
- Screenshot beautifier
Frames, backgrounds, shadows for social
- Signature extractor
Photo of a signature to clean transparent PNG
- Social media resizer
One image to every platform size
- SVG optimizer
SVGO in the browser
- SVG to PNG
Export at any resolution
- Watermark image
Text or logo, batch mode
Files & Privacy24
- Bulk file renamer
Pattern-based renaming via the browser folder API
- Create ZIP
Zip files and folders in the browser
- Document metadata scrubber
Strip hidden data from DOCX, XLSX, PDF, images
- Encoding converter
UTF-8, UTF-16, ISO; fix mojibake and broken rupee symbols
- Encrypted file share
End-to-end encrypted links with expiry
- Extract archives
ZIP, RAR, 7z, TAR.GZ without installing anything
- File splitter
Split and rejoin large files
- File type identifier
Detect the real type from bytes
- Hex viewer
Inspect binary files
- Line ending converter
CRLF to LF and back
- One-time secret
Share a password that self-destructs after reading
- Aadhaar masker
Redact Aadhaar numbers on images and PDFs per UIDAI norms
- CSP builder
Content-Security-Policy generator and analyzer
- DPDP notice generator
Template-based privacy notices for Indian SMBs
- File encryptor
AES-GCM password protection, fully offline
- JWT security linter
alg=none, weak keys, expiry checks
- Password strength auditor
zxcvbn score with a crack-time story
- PGP toolkit
Encrypt, decrypt, sign with OpenPGP.js
- Phishing URL analyzer
Unmask shorteners, punycode, redirect chains
- PII detector
Find emails, phones, PAN, Aadhaar patterns in text
- Pwned password check
k-anonymity lookup; the hash never leaves the browser
- Sandboxed HTML preview
Open suspicious HTML attachments safely
- Secret scanner
Paste code or logs, find API keys and tokens
- Security headers grader
Scan a site's response headers
References16
- ASCII and Unicode table
Searchable character reference
- Common ports
Service to port lookup
- Country codes
ISO 3166 plus dialing codes
- Currency codes
ISO 4217 with symbols
- Git cheatsheet
Common workflows and fixes
- HTML entities list
Searchable with copy buttons
- HTTP status codes
Every code explained with examples
- JS key codes
Press a key, see event.key and event.code
- Linux commands
Everyday ops reference
- Markdown cheatsheet
With live preview
- MIME types
Extension to content-type lookup
- Paper sizes
A-series, Letter, Legal in mm and px
- Regex cheatsheet
Patterns organized by task
- Social image sizes
All platforms, kept current
- SQL cheatsheet
Joins, windows, dates
- Timezone list
IANA zones with current offsets
Web & SEO25
- CIDR calculator
Subnets, ranges, masks
- CSR / certificate decoder
Paste PEM, read every detail
- DNS lookup
A, AAAA, MX, TXT, NS, CNAME via DNS-over-HTTPS
- Email address validator
Syntax, MX via DoH, disposable-domain list
- Email header analyzer
Trace the received path and auth results
- Favicon generator
Every size plus manifest from one image
- hreflang generator
Multi-language tag sets
- HTTP header inspector
Response headers with a security grade
- JSON-LD generator
Organization, FAQ, Article, LocalBusiness schema
- Keyword density checker
On-page term frequency
- Meta tag generator
Title, description, OG, Twitter boilerplate
- Meta tag previewer
Google SERP plus WhatsApp / LinkedIn / X card preview
- QR code generator
URL, text, WiFi, vCard with logo and SVG export
- QR scanner
Decode from camera or image
- Redirect tracer
Follow 301/302 chains hop by hop
- robots.txt tester
Parse rules, test URLs against them
- SERP pixel checker
Title and description truncation preview
- Sitemap validator
Paste or upload, check URLs and structure
- SPF/DKIM/DMARC checker
Email deliverability records, explained plainly
- SSL certificate checker
Expiry, chain, SANs for any domain
- URL parser
Decompose and rebuild URLs, edit query params
- User-agent parser
Browser, OS, device from a UA string
- UTM builder
Campaign URLs with saved presets
- What is my IP
IP, ASN, rough location
- WHOIS lookup
Domain registration data
No results yet? Tools ship in waves — this index shows the whole library and updates as each one goes live and unit-tested in public.