RVNT Tools
Free tools that respect your privacy
Converters, generators, and developer utilities that run entirely in your browser — nothing you enter is ever uploaded, tracked, or stored. No accounts, no ads, no nonsense.
Converters
Units, colors, numbers, formats — convert anything, instantly, in your browser.
Unit Converter Length, mass, temperature, data, speed & time. Color Converter HEX ↔ RGB ↔ HSL with a live swatch. Number Base Converter Binary, octal, decimal, hex & any base. CSS Unit Converter px ↔ rem ↔ em ↔ pt, by root size. Color Palette Generator Tints, shades & harmonies from one color. CSS Gradient Generator Build a gradient, copy the CSS. Roman Numeral Converter Numbers ↔ Roman numerals. Number to Words Spell out numbers & money amounts. Time Zone Converter Convert a time across time zones.
PDF & Documents
Edit, merge, split and build PDFs right on your phone — files never leave the page.
Media & Images
Resize, convert, compress and clean images — in your browser, never uploaded.
Image Converter & Compressor Convert, resize & shrink — never uploaded. EXIF Viewer See the hidden data in your photos. Image to Base64 Encode an image as a data URI. Favicon Generator Make a favicon from any image. Image Resizer & Compressor Resize and shrink images, privately. Color Contrast Checker WCAG AA / AAA contrast, instantly. Color Blindness Simulator See your image as ~8% of people do. Barcode Generator Code 128 barcodes as crisp SVG. Placeholder Image Generator Custom placeholder images, instantly. SVG to PNG Converter Rasterize SVG to PNG at any size. Audio Trimmer Trim & cut audio in your browser. Image Cropper Crop images to any ratio. Image Color Extractor Pull the palette from any image. Base64 to Image Decode base64 / data URIs to images. Image to ASCII Art Turn an image into ASCII text art. Image Metadata Remover Strip EXIF, GPS & metadata before sharing.
Text
Count, transform, compare and clean up text without leaving the page.
Word Counter Words, characters, sentences & read time. Case Converter UPPER, lower, Title, camelCase, snake_case… Lorem Ipsum Generator Placeholder text on demand. Slug Generator Turn any text into a URL slug. Text Line Tools Sort, dedupe, reverse & trim lines. Markdown Preview Write Markdown, see it render live. Morse Code Translator Text ↔ Morse, with playback. Readability Scorer Flesch reading ease & grade level. Fancy Text Generator Bold, italic & script Unicode text. Word Frequency Counter Most-used words & counts.
Calculators
Money, math and measurements — answers worked out instantly, on-device.
Aspect Ratio Calculator Resize while keeping the ratio. Percentage Calculator Every percentage question, solved. Loan & Mortgage Calculator Monthly payment, interest & schedule. Age Calculator Your exact age in years, months & days. Tip Calculator Tip, total & split per person. BMI Calculator Body mass index, metric or imperial. Discount Calculator Sale price, savings & percent off. Date Difference Calculator Days, weeks & months between dates. GPA Calculator Grade point average, weighted or not. Unit Price Calculator Compare price per unit — find the deal.
Developer
Format, encode, decode, generate and inspect — the everyday dev staples.
JSON Formatter Format, validate & minify JSON. Base64 Encoder / Decoder Encode & decode Base64, Unicode-safe. URL Encoder / Decoder Percent-encode & decode URLs. UUID Generator Random v4 UUIDs, in bulk. Timestamp Converter Unix epoch ↔ human date. Regex Tester Test patterns, see live matches. HTML Entity Encoder / Decoder Escape & unescape HTML safely. Diff Checker Compare two texts, line by line. CSV ↔ JSON Converter CSV to JSON and back, both ways. Cron Expression Explainer Decode a cron schedule, in plain English. QR Code Generator Make a QR code — no tracking, no expiry. IP Subnet Calculator CIDR → network, range, mask & hosts. CSS Box Shadow Generator Design a shadow, copy the CSS. JSON to TypeScript Generate interfaces from JSON. Meta Tags Generator SEO, Open Graph & Twitter tags. JSON to YAML Converter Convert JSON ↔ YAML, both ways. Crontab Builder Build a cron expression visually. Markdown Table Generator Build tables, export Markdown/CSV/HTML. URL Parser Break a URL into its parts. SQL Formatter Beautify & indent SQL queries. CSS Minifier Shrink CSS — strip comments & space. HTML Minifier Collapse HTML whitespace & comments. Hex Viewer Hex dump of text or a file. JSON to CSV Convert JSON arrays to CSV. .gitignore Generator Build a .gitignore from your stack. CSS clamp() Generator Fluid font sizes with clamp(). JWT Signature Verifier Verify a JWT's HMAC signature & claims. Caesar & Vigenère Cipher ROT13, Caesar, Atbash & Vigenère. ULID Generator Sortable, unique IDs (ULID). File Type Detector Identify a file by its magic bytes. Base32 Encoder / Decoder RFC 4648 Base32, both ways. User-Agent Parser Decode a User-Agent string.
Security & Privacy
Passwords, hashes, encryption — generated locally and never sent anywhere.
Password Generator Strong, random passwords — generated locally. Hash Generator SHA-1, SHA-256, SHA-384 & SHA-512. JWT Decoder Decode a JSON Web Token, locally. HMAC Generator Keyed HMAC: SHA-256 / 384 / 512. Encrypt & Decrypt Text AES-256 password encryption, in-browser. File Checksum SHA-256 / 384 / 512 of any file, locally. Passphrase Generator Memorable, strong, diceware-style. Bcrypt & htpasswd Generator Bcrypt hashes & .htpasswd lines. Password Strength Checker Entropy & crack-time estimate. TOTP / 2FA Code Generator Time-based one-time codes (RFC 6238). PGP Encryption Tool Generate keys, encrypt & decrypt — in-browser. File Encryptor Password-encrypt any file (AES-256). Shamir's Secret Sharing Split a secret into shares; recover with any K. Encrypted Secret Link Share a secret via a self-decrypting link. Tracking Link Cleaner Strip trackers from any URL. Hash Identifier Identify a hash by its format. Image Steganography Hide a secret message inside a PNG. SSH Key Fingerprint SHA-256 fingerprint of an SSH key. Random Key Generator Cryptographically-secure random keys. SSL Certificate Decoder Decode a PEM / X.509 certificate. Email Header Analyzer Trace hops, check SPF/DKIM/DMARC. Punycode & Homograph Detector Spot spoofed lookalike domains. HOTP Generator Counter-based one-time codes (RFC 4226). SRI Hash Generator Subresource Integrity hashes.
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