148 tools · no sign-up · runs in your browser
Free Online Developer Tools, Calculators, Generators and Converters
Everything you need to convert, encode, hash, generate and format, fast, private, and free. No files are uploaded; every tool runs locally in your browser.
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Twelve categories covering the full developer toolbox.
Number, Math & Measurement Tools Base, fraction, percentage and floating-point converters. 23 tools Encoding & Decoding Tools Base64, Base32/58/62/85, URL, Unicode and cipher tools. 30 tools Text & Character Tools Text ↔ binary, ASCII and hex character converters. 7 tools Color Conversion Tools HEX, RGB, HSL, CMYK and Pantone color converters. 8 tools Unique ID Generators UUID, GUID, ULID, NanoID, Snowflake and KSUID generators. 17 tools Cryptography & Security Tools Hashes, HMAC, bcrypt/Argon2, JWT, TOTP and passwords. 15 tools Network & IP Tools Subnet and CIDR calculators, IP converters, MAC tools. 9 tools Date & Time Tools Unix timestamp conversion in seconds and milliseconds. 1 tools Code & Data Tools Formatters and validators for JSON, XML, SQL, CSS and more. 17 tools Web & Server Tools chmod, cron, robots.txt, UTM, HTTP and URL utilities. 12 tools Compression & Archive Tools Gzip, Zip and tar.gz compression and extraction. 4 tools Generators & Utility Tools Lorem ipsum, barcodes, random numbers and dummy data. 5 tools
Popular tools
Json Formatter A lightweight data-interchange format. Base64 Converter Representing binary data as ASCII text using a 64-character alphabet. Uuid Generator A 128-bit identifier, generated here as random version 4. Hash Generator Producing a fixed-length digest with MD5, SHA-1, SHA-256, SHA-384, SHA-512 or CRC32. Jwt Validator A signed, URL-safe token carrying JSON claims. Hex To Rgb Converter Splitting a hex colour into red, green and blue channels. Cron Expression Generator The five-field syntax for scheduling recurring jobs. Password Generator Creating strong random passwords from selectable character sets. Unix Timestamp Converter Seconds elapsed since the 1970 epoch. Regular Expression Tester Pattern matching against text with capture groups. Subnet Calculator Deriving network, broadcast and host ranges from an address and mask. Url Encoder Decoder URL percent-encoding of reserved characters per RFC 3986.
All tools
148 tools
Number Converters
Number ConverterNumber Base ConverterHex to Decimal ConverterDecimal to Hex ConverterDecimal to Binary ConverterBinary to Decimal ConverterHex to Binary ConverterBinary to Hex ConverterOctal ConverterTwo's Complement ConverterFloating Point ConverterScientific Notation ConverterBCD ConverterFraction to Decimal ConverterDecimal to Fraction ConverterFractional Inches to Decimal ConverterPercent to Decimal ConverterDecimal to Percent ConverterMinutes to Decimal ConverterDecimal to Minutes ConverterDecimal Hours ConverterDMS to Decimal Degrees ConverterDecimal Rounding Calculator
Encoding & Decoding
Base64 ConverterBase DecoderBase32 Encoder DecoderBase64 DecoderImage To Base64 ConverterBase64 To Image ConverterBase62 Encoder DecoderBase64 To Text DecoderText To Base64 EncoderBase58 Encoder DecoderBase64 To File ConverterFile To Base64 ConverterEncoder DecoderHex To Base64 ConverterUnicode ConverterBase64url Encoder DecoderBase64 To Pdf ConverterBase64 To Binary ConverterBase85 Encoder DecoderCertificate DecoderBase64 EncoderBase64 To Hex ConverterUrl Encoder DecoderBinary To Base64 ConverterData Uri GeneratorPdf To Base64 ConverterPunycode Encoder DecoderQuoted Printable Encoder DecoderMorse Code TranslatorRot13 Encoder Decoder
Text Tools
Color Tools
ID Generators
Security Tools
Network Tools
Date & Time
Code & Data
Web & Server
Generators
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