Developer
19 tools in this category
Tool of the dayCloud
AWS IAM Policy Linter
Validate AWS IAM policy JSON and surface common misconfigurations — missing Version, conflicting Action/NotAction, Resource wildcards, publicly exposed Principals, and bad "service:Operation" names.
Try it nowNew tool tomorrow
Favorites
Nothing pinned yet
Star tools you love so they're one tap away.
Recently used
Your trail starts here
Tools you open will appear here so you can jump back fast.
Browse by category
Guides & how-tos
All guides- #nepal
Nepal's new income tax rates for 2083/84: how much will you actually save?
The new slabs tax the first Rs 10 lakh at 1% and drop the top rate from 39% to 29%. Here is what changes for real salaries, with the numbers worked out.
6 min read - #encoding
Base64 vs base64url: what's the difference?
Standard Base64 uses + and /, which break inside URLs. base64url swaps them for - and _. Here's when to use each.
3 min read - #nepali
Bikram Sambat to Gregorian (AD): the complete guide
Bikram Sambat runs about 56 years and 8-9 months ahead of AD, with months that change length year to year. Here's how the two calendars actually line up.
4 min read - #nepali
How to convert Nepali dates accurately for visa and official forms
Converting a Nepali date for a passport or visa form leaves no room for an off-by-one error. Here's how to get it exactly right.
3 min read
92+ tools · runs entirely in your browserFree online tools,
Free online tools,
built for speed.
A growing collection of fast, clean, no-nonsense utilities for developers, writers, and everyday work. No sign-ups, no ads, no data leaves your browser.
- Tools
- 92+
- Categories
- 10
- Cost
- Free
Tool of the dayCloud
AWS IAM Policy Linter
Validate AWS IAM policy JSON and surface common misconfigurations — missing Version, conflicting Action/NotAction, Resource wildcards, publicly exposed Principals, and bad "service:Operation" names.
Try it nowNew tool tomorrow
Explore by intent
Browse by category
Every category is focused on a specific kind of everyday task.
Math
6 tools in this category
- Nepali Date Converter (BS ↔ AD)
- Nepali Date of Birth & Age Calculator
- Nepali Land Area Converter
- Nepali Patro — Bikram Sambat Calendar
Text
25 tools in this category
Design
3 tools in this category
Encoding
11 tools in this category
Security
10 tools in this category
Marketing
4 tools in this category
Data
6 tools in this category
Finance
5 tools in this category
- Loan / EMI Calculator
- Compound Interest Calculator
- Nepal Income Tax Calculator 2083/84
- Mortgage Calculator
Cloud
3 tools in this category
All tools
Pick a tool and start working — results are instant.
Developer
Timestamp Converter
Convert Unix timestamps to human-readable dates and back, in seconds or milliseconds. Live epoch clock, ISO 8601, UTC, and any timezone — free and fully in-browser.
Open tool
Developer
Time Zone Converter
Compare up to 4 time zones side-by-side with a live 24-hour grid. Search by city, country, IANA, or abbreviation (GMT, NPT, IST, EST). Star favorites, pick a meeting time that works everywhere.
Open tool
Math
Nepali Date Converter (BS ↔ AD)
Convert dates between Nepali Bikram Sambat (BS) and English Gregorian (AD) instantly — with Nepali month names, Nepali digits, a live BS calendar, and today highlighted for Nepalis at home and abroad.
Open tool
Math
Nepali Date of Birth & Age Calculator
Enter your date of birth in Bikram Sambat (BS) or English (AD) and get your exact current age in years, months, and days — plus total days lived, the weekday you were born, and a countdown to your next birthday. Fully in-browser and private.
Open tool
Math
Nepali Land Area Converter
Convert Nepali land measurements instantly — Ropani, Aana, Paisa, Daam (hilly) and Bigha, Kattha, Dhur (Terai) to and from square feet, square metres, hectares, and acres. Enter a composite land size and see every equivalent, all in your browser.
Open tool
Math
Nepali Patro — Bikram Sambat Calendar
Browse the Nepali calendar (Bikram Sambat) month by month with the matching English (AD) date in every cell, Saturdays and national holidays marked in red, and today highlighted. Navigate any BS month, with the festivals each month usually brings.
Open tool
Text
Nepali Font Converter (Preeti ↔ Unicode, Roman → Nepali)
Convert Preeti to Unicode, Unicode to Preeti, and type Romanized English phonetically into Nepali Unicode — instantly, privately in your browser. Built for writers, editors, government staff, and anyone migrating old Preeti documents to modern Unicode.
Open tool
Developer
Number Base Converter
Convert binary, decimal, octal, and hexadecimal values with grouped formatting and optional bit-length padding.
Open tool
Design
Color Converter
Convert HEX, RGB, and HSL color formats instantly with a visual picker, palette suggestions, and copyable outputs.
Open tool
Design
NadirPatch — 360° Nadir Logo Patch
Cover the tripod at the bottom of a 360° photo with your logo — patched entirely in your browser, with the GPano 360 metadata preserved so Facebook, Google Street View, and Kuula still recognize the export as a panorama. Free and privacy-first: your panorama is never uploaded.
Open tool
Design
Color Picker
Interactive color picker with eyedropper support, image upload and URL sampling, saturation/brightness canvas, hue and opacity sliders, HEX / RGB / RGBA / HSL / CMYK output, CSS named-color lookup, nearest-name matching, and saved swatches.
Open tool
Math
Unit Converter
Convert units across length, mass, temperature, speed, area, and volume with category switching and recent history.
Open tool
Math
CGPA to Percentage Converter
Convert CGPA to percentage and percentage to CGPA on 10-point (CBSE / Indian universities) and 4-point (US GPA) scales — designed for Indian and Nepali students.
Open tool
Developer
JSON Formatter
Format, validate, and beautify JSON live as you type — 2-space, 4-space, or tab indentation, alphabetical key sorting, and error messages with the exact line and column. 100% in-browser.
Open tool
Encoding
Base64 Encode
Encode text or Unicode (emoji, accents, any language) to Base64 — or URL-safe base64url — instantly in your browser. Live output, byte counts, and one-click copy.
Open tool
Encoding
Base64 Decode
Decode Base64 or URL-safe base64url back to readable UTF-8 text as you type. Tolerates missing padding and line breaks, with instant validation and copy.
Open tool
Encoding
Base64 to Image
Paste a Base64 string or data:image URL and preview the image instantly, with type, dimensions, and size — then download it. Decoded locally, never uploaded.
Open tool
Encoding
Image to Base64
Drag and drop a PNG, JPG, GIF, WebP, or SVG and get a Base64 Data URL you can paste straight into CSS, HTML, or JSON. Encoded in your browser — nothing is uploaded.
Open tool
Text
Word Counter
Count words, characters, sentences, paragraphs, and lines with reading and speaking time, unique-word count, and top-keyword density — live as you type, all in your browser.
Open tool
Text
Emoji Remover
Remove emojis from text while keeping letters, numbers, punctuation, and readable spacing.
Open tool
Security
Email Validator
Instantly check if an email address is valid with normalized output and clear error messages.
Open tool
Security
Email Extractor
Extract unique email addresses from text, logs, and messy documents in one click.
Open tool
Developer
IDN Punycode Converter
Convert Unicode domains to punycode and decode punycode back to internationalized domain names.
Open tool
Encoding
URL Encode
Percent-encode text for safe use in URLs, query strings, and form fields. Switch between component (encodeURIComponent) and full-URL (encodeURI) modes with live output.
Open tool
Encoding
URL Decode
Decode percent-encoded (%20, %26 …) URL strings back to readable text as you type, with + treated as a space and clear errors for malformed input.
Open tool
Text
Slug Generator
Turn titles into clean, URL-safe slugs with dash or underscore separators, SEO stopword removal, a custom length cap, and bulk line-by-line conversion — all in your browser.
Open tool
Text
Case Converter
Convert text between lower, UPPER, Title, camelCase, snake_case, and more.
Open tool
Security
Password Generator
Free strong password generator and passphrase generator. Create 8, 12, 15, 16, 20, or 32 character random passwords, or memorable 3–7 word passphrases, with a live strength meter, entropy in bits, and crack-time estimate. Everything runs locally in your browser.
Open tool
Security
htpasswd Generator
Generate .htpasswd credentials for Apache and Nginx Basic Auth. Create APR1-MD5 or SHA-1 entries, build multi-user files, and follow practical setup steps to protect folders with .htaccess or server config.
Open tool
Developer
UUID Generator
Generate random v4 UUIDs instantly — single or bulk.
Open tool
Developer
Random Number Generator
Generate random numbers with custom min/max range, decimal precision, and batch output for analytics, testing, and simulations.
Open tool
Developer
Random String Generator
Generate cryptographically random strings live — one-click presets for API keys, hex tokens, PINs, promo codes, and license keys, bulk generation up to 100 at once, dash grouping, custom characters, and a per-string entropy meter.
Open tool
Text
Lorem Ipsum Generator
Generate placeholder text in words, sentences, or paragraphs.
Open tool
Security
Hash Generator
Compute MD5, SHA-1, or SHA-256 hashes of any text.
Open tool
Developer
JWT Decoder
Decode and inspect JSON Web Tokens without verification.
Open tool
Security
JWT Encoder
Create JWT tokens with custom header and payload JSON, optional HMAC signing, and expiration controls for secure API testing.
Open tool
Security
Hash Compare Tool
Compare two hashes with exact matching, timing-safe comparison, and similarity detection to catch subtle differences quickly.
Open tool
Security
HMAC Generator
Generate HMAC signatures using SHA-256, SHA-384, or SHA-512 with an API testing mode for method, path, timestamp, and body signing.
Open tool
Encoding
HTML Entity Encode
Encode special characters into HTML entities.
Open tool
Encoding
HTML Entity Decode
Decode HTML entities back to readable characters.
Open tool
Encoding
Binary Converter
Convert text to 8-bit binary and decode binary bytes back to text live, with byte and bit counts. Great for learning ASCII, debugging payloads, and CS homework.
Open tool
Developer
Regex Tester
Test regular expressions against text with live match highlighting.
Open tool
Marketing
Campaign URL Builder
Create analytics-ready URLs with required UTM validation, preset templates, and instant copyable output.
Open tool
Marketing
WhatsApp Link Generator
Create a free WhatsApp click-to-chat link (wa.me) for any phone number, with an optional prefilled message, QR code, and copy-ready HTML/Markdown. Pick a country or paste a full international number — everything runs in your browser.
Open tool
Data
JSON to YAML Converter
Convert JSON to clean, two-space indented YAML for Kubernetes manifests, GitHub Actions, Docker Compose, and Ansible — free and fully client-side.
Open tool
Data
YAML to JSON Converter
Parse YAML into JSON with full block and flow syntax support. Ideal for Kubernetes, Docker Compose, and GitHub Actions configs.
Open tool
Data
JSON to CSV Converter
Flatten a JSON array of objects into a spreadsheet-ready CSV with header row, RFC 4180 quoting, and comma, tab, semicolon, or pipe delimiters.
Open tool
Data
CSV to JSON Converter
Convert CSV to a JSON array with header detection, type coercion, and RFC 4180 quoted-field handling. Supports TSV, semicolon, and pipe-delimited files.
Open tool
Data
JSON to XML Converter
Emit well-formed XML from JSON with a configurable root element, optional XML declaration, entity escaping, and pretty indentation.
Open tool
Data
XML to JSON Converter
Parse XML into JSON with attribute (@attr) and text-node (#text) preservation. Works with SOAP responses, RSS feeds, sitemaps, and legacy APIs.
Open tool
Text
Markdown Preview
Write or paste Markdown — including output from ChatGPT, Claude, or Gemini — and see a live HTML preview with word count and reading time. Copy or download clean HTML, all client-side.
Open tool
Text
Text Diff
Compare two texts in a unified or side-by-side view with word-level highlighting, ignore case/whitespace options, a similarity score, and a downloadable .diff patch. 100% in-browser.
Open tool
Text
Random Sentence and Paragraph Generator
Generate random English sentences or full paragraphs for placeholder copy, writing prompts, design mockups, and reading-rate exercises. Pick how many sentences or paragraphs and regenerate on demand.
Open tool
Text
Acronym and Backronym Generator
Turn any phrase into an acronym (with stopword skipping and capitalization options) or expand a set of letters into a fresh backronym from a curated word pool.
Open tool
Text
Text Style Encoder (Pig Latin, Leetspeak, ROT13, Vigenère, more)
Transform text into Pig Latin, leetspeak (l337), reversed, ROT13, Vigenère cipher (encode/decode), mocking SpongeBob case, or w i d e spaced styles — all in one tool with one-click copy.
Open tool
Text
Find and Replace (Regex)
Find and replace text with literal or regex patterns. Case-sensitive, whole-word, multiline, dot-all, and Unicode-aware options. Supports capture groups ($1, $&, $`) in the replacement.
Open tool
Text
Readability Score Checker
Score any text against five standard readability formulas — Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, SMOG, Automated Readability Index, and Coleman-Liau — with a single averaged grade level and word, sentence, and syllable stats.
Open tool
Text
Whitespace & Indentation Cleaner
Strip trailing whitespace, collapse blank lines, convert tabs ↔ spaces, normalize line endings, and clean up weird Unicode spaces — with before/after stats and full control over what gets touched.
Open tool
Text
Username Generator
Generate memorable, unique usernames using customizable patterns — adjective + noun, with optional numbers, separators, and casing. Get a batch at a time and copy your favorites.
Open tool
Text
Zalgo Text Generator
Glitch, distort, and corrupt any text with Zalgo-style combining marks. Adjust intensity, choose marks above, middle, or below, and copy ready-to-paste glitchy text for posts, bios, and games.
Open tool
Text
NATO Phonetic Alphabet Converter
Convert text to the NATO phonetic alphabet (Alpha Bravo Charlie) and back. Spell names and codes clearly on the phone, in radio comms, or anywhere clarity matters.
Open tool
Text
Fancy Text Generator
Convert plain text into 21 fancy Unicode styles — bold, italic, cursive, script, fraktur, double-struck, monospace, fullwidth, small caps, circled, strikethrough, underline, upside down, and more — copy any variant for bios, captions, and posts.
Open tool
Text
Character Counter with Platform Limits
Live character, word, byte, and grapheme counter with progress bars for X, Bluesky, Mastodon, LinkedIn, Instagram, YouTube, SMS, SEO meta tags, Discord, Slack, and more.
Open tool
Text
Text Line Tools
Sort, deduplicate, reverse, shuffle, trim, number, or prefix lines of text in one place. Case-insensitive options, blank-line removal, and per-line prefix/suffix wrapping included.
Open tool
Developer
README Badge Generator
Build shields.io badges for npm, GitHub Actions, Docker, PyPI, license, coverage, and custom labels — with live preview and copy-ready Markdown, HTML, or URL output.
Open tool
Text
Markdown TOC Generator
Scan a Markdown document and generate a linked table of contents with adjustable heading depth, ordered or bullet lists, and GitHub-compatible anchor slugs.
Open tool
Text
Markdown Table Generator
Paste TSV, CSV, or pipe-separated rows and get a clean Markdown table with column alignment, header toggle, and compact mode — all in your browser.
Open tool
Developer
HTML Minifier
Shrink HTML by removing comments, collapsing whitespace, and stripping noise — without breaking the contents of <pre>, <textarea>, <script>, or <style>. Reports byte savings instantly.
Open tool
Developer
CSS Minifier
Compress CSS by stripping comments, collapsing whitespace, and removing redundant semicolons. Outputs production-ready CSS with byte savings reported.
Open tool
Developer
JavaScript Minifier
Strip comments and unnecessary whitespace from JavaScript so it ships in fewer bytes — with string and regex literals preserved exactly. Runs entirely in your browser.
Open tool
Developer
SQL Formatter / Beautifier
Format messy SQL into a readable, standard layout — uppercase keywords, one clause per line, indented JOINs and subqueries. Works with PostgreSQL, MySQL, SQLite, and SQL Server dialects.
Open tool
Developer
URL Parser
Break any URL into protocol, host, port, path segments, query parameters, and fragment. Includes one-click decoding and a copyable JSON view for debugging redirects, deep links, and tracking URLs.
Open tool
Developer
User Agent Parser
Paste any User-Agent string and instantly see the browser, engine, OS, device type, and version. Built for log triage, analytics QA, and bug reports.
Open tool
Text
HTML Tags Remover
Strip HTML tags from any block of text and keep only the readable content. Decodes entities, collapses whitespace, and is ideal for cleaning rich-text exports before reuse.
Open tool
Text
BBCode to HTML
Convert forum-style BBCode to clean HTML with safe tag handling. Supports bold, italic, underline, links, images, lists, code blocks, quotes, and color tags.
Open tool
Developer
JSON Minifier
Strip whitespace from JSON to produce the smallest valid payload, live as you type. Reports savings in bytes and percentage, with one-click copy and .json download.
Open tool
Developer
Cron Expression Builder & Explainer
Build cron schedules with a step-by-step picker, then read the plain-English explanation, the next runs in any IANA timezone, and ready-to-paste snippets for crontab, Kubernetes CronJob, Spring @Scheduled, AWS EventBridge, and GitHub Actions. Standard, 6-field, and Quartz dialects (with L, W, # specials) all supported.
Open tool
Encoding
Morse Code Translator
Translate text to Morse code and decode Morse back to letters live. Handles letters, digits, punctuation, and / word separators — with character and word counts.
Open tool
Encoding
Caesar Cipher / ROT13
Encode and decode text with a classic Caesar shift cipher. Live output, a shift slider, a ROT13 preset, and a clickable brute-force preview of all 26 shifts.
Open tool
Marketing
YouTube Thumbnail Downloader
Download YouTube video thumbnails in HD (1280×720), SD, HQ, MQ, and default sizes from any watch, Shorts, youtu.be, embed, or live URL — instantly and free.
Open tool
Security
Credit Card Validator
Validate credit card numbers with the Luhn algorithm, detect the card brand, and compute the expected check digit — 100% client-side.
Open tool
Text
Typing Tutor
Practice typing with structured lessons, quick speed tests, or your own text. See your WPM and accuracy instantly. Supports English and Nepali — runs entirely in your browser.
Open tool
Finance
Loan / EMI Calculator
Calculate the monthly payment (EMI) on a personal, auto, student, or business loan. Includes total interest, amortization schedule, and support for 10 currencies — all in your browser.
Open tool
Finance
Compound Interest Calculator
Project investment or savings growth with compound interest — including monthly contributions, multiple compounding frequencies (daily, monthly, quarterly, yearly, continuous), and a year-by-year breakdown.
Open tool
Finance
Nepal Income Tax Calculator 2083/84
Free Nepal salary income tax calculator for FY 2083/84 (Finance Act 2083). New 1% slab up to Rs 10 lakh, top rate cut to 29%. Calculate annual tax, monthly TDS, effective rate, and compare old vs new slabs instantly — 100% in your browser.
Open tool
Finance
Mortgage Calculator
Estimate your full monthly mortgage payment with principal, interest, property tax, home insurance, and HOA. Shows loan-to-value, down-payment percentage, and flags low-down-payment PMI risk.
Open tool
Finance
Tip & Bill Split Calculator
Compute the tip on a restaurant bill and split the total evenly across any number of people. Includes tip presets, round-up, and currency selection.
Open tool
Cloud
AWS ARN Parser
Paste any AWS Amazon Resource Name (ARN) and instantly see its partition, service, region, account ID, and resource. Flags malformed ARNs and links you to the matching AWS console page.
Open tool
Cloud
S3 URI / URL Parser
Convert between s3:// URIs, virtual-hosted URLs, path-style URLs, and ARNs for any Amazon S3 object. Extract bucket, key, region, and version ID, and generate ready-to-run aws-cli commands.
Open tool
Cloud
AWS IAM Policy Linter
Validate AWS IAM policy JSON and surface common misconfigurations — missing Version, conflicting Action/NotAction, Resource wildcards, publicly exposed Principals, and bad "service:Operation" names.
Open tool
Marketing
Hashtag Generator
Generate high-performing Instagram and TikTok hashtags from a single keyword — grouped into Safe Bets, Viral Potential, and Niche Gems, with caption keywords, trend and difficulty indicators, per-tag refresh, and a live social preview.
Open tool
Security
Safa — Clean Premium Adblocker
Safa is a clean, premium ad blocker for Chrome that blocks ads, trackers, and intrusive overlays — with no accounts, no sync, and no telemetry. Free, fast, and Manifest V3.
Open tool
Guides & how-tos
Short, practical reads on the formats and encodings behind the tools.
- #nepal
Nepal's new income tax rates for 2083/84: how much will you actually save?
The new slabs tax the first Rs 10 lakh at 1% and drop the top rate from 39% to 29%. Here is what changes for real salaries, with the numbers worked out.
6 min read - #encoding
Base64 vs base64url: what's the difference?
Standard Base64 uses + and /, which break inside URLs. base64url swaps them for - and _. Here's when to use each.
3 min read - #nepali
Bikram Sambat to Gregorian (AD): the complete guide
Bikram Sambat runs about 56 years and 8-9 months ahead of AD, with months that change length year to year. Here's how the two calendars actually line up.
4 min read - #nepali
How to convert Nepali dates accurately for visa and official forms
Converting a Nepali date for a passport or visa form leaves no room for an off-by-one error. Here's how to get it exactly right.
3 min read
Why developers pick UtilitySansar
Every tool is designed around three principles: be fast, respect your data, and get out of the way.
100% client-side
Your input never leaves the browser — no servers involved.
Zero setup
Open a tool, paste your data, and copy the result.
No noise
Clean UI, dense output, keyboard-friendly wherever it makes sense.