Svi alati
besplatni alati za veb programere
Converters
Parser cron izraza
Parsiranje Cron izraza za dobijanje zakazanih datuma
Generator cron izraza
Vizuelno pravite cron izraze pomoću cron graditelja i pregledajte zakazane datume
Konvertor datuma
Konvertujte datum u čitljiv format i obrnuto
JSON niz u tabelu
Konvertujte JSON niz u tabelarni format, izvezite u CSV ili TSV
JSON <> YAML konvertor
Konvertujte JSON podatke u YAML i obrnuto
Konvertor brojne osnove
Konvertujte brojeve iz jedne osnove u drugu
Konvertor rimskih brojeva
Konvertujte između rimskih brojeva i arapskih brojeva
XML <> JSON konvertor
Konvertujte XML podatke u JSON i obrnuto
Markdown <> HTML konvertor
Konvertujte Markdown u HTML i obrnuto
Konverter HTML u JSX
Konvertujte HTML markup u JSX sintaksu za React
JSON <> TOML konvertor
Konvertujte JSON podatke u TOML i obrnuto
YAML <> TOML konvertor
Konvertujte YAML podatke u TOML i obrnuto
Ekstraktor OPML RSS URL-ova
Izdvojite URL-ove RSS fidova iz OPML fajlova
Generator OPML-a iz RSS URL-ova
Generišite OPML fajlove iz URL-ova RSS fidova
Konvertor veličine podataka / bajtova
Konvertujte između različitih jedinica veličine podataka: bitovi, bajtovi, kilobajti, megabajti, gigabajti, terabajti, petabajti
Konvertor cURL-a u kod
Konvertujte cURL komande u kod na više jezika
Generator koda iz JSON-a
Generišite tipove i klase iz JSON-a za više jezika
chmod kalkulator
Izračunajte Unix dozvole za fajlove uz vizuelne čekboksove, oktalnu i simboličku notaciju
Unit Converter
Convert between units of length, weight, temperature, data size, time, and more
Docker Run to Compose
Convert docker run commands to docker-compose.yml files instantly
Protobuf Decoder / Encoder
Decode Protocol Buffer messages from Base64 or hex without a schema definition
JSON Table Viewer
Visualise a JSON array as a sortable interactive table with CSV export
Coordinates Converter
Convert coordinates between DD, DMS and UTM
CBOR / MessagePack Codec
Encode JSON to CBOR or MessagePack binary and decode back — compare sizes and inspect hex or Base64 output
Network
Kalkulator IPv4 podmreže
Izračunajte subnet maske, mrežne opsege i broadcast adrese iz CIDR-a.
Konvertor IPv4 adresa
Konvertujte IPv4 adrese između decimalnog, heksadecimalnog i binarnog formata.
Proširivač IPv4 opsega
Proširite IPv4 opsege u liste adresa i broj adresa.
IPv6 parser / proširivač
Parsiranje, skraćivanje i proširivanje IPv6 adresa.
TLS Version Checker
Check TLS/SSL version, certificate details, and cipher suite for any hostname
Encoders / Decoders
Base64 enkoder / dekoder slika
Kodirajte i dekodirajte Base64 podatke slike
Base64 enkoder / dekoder teksta
Kodirajte i dekodirajte Base64 tekstualne podatke
Dekoder sertifikata
Dekodirajte sertifikat
GZip kompresija / dekompresija
Kompresujte ili dekompresujte tekst u GZip formatu
HTML enkoder / dekoder teksta
Kodirajte i dekodirajte HTML tekstualne podatke
JWT enkoder / dekoder
Kodirajte i dekodirajte Json Web Token
URL enkoder / dekoder
Kodirajte ili dekodirajte sve primenljive karaktere u odgovarajuće URL entitete
Quoted-Printable enkoder / dekoder
Kodirajte ili dekodirajte tekst koristeći quoted-printable format (RFC 2045)
Konverter Hex u ASCII / ASCII u Hex
Konvertujte između heksadecimalnog i ASCII tekstualnog formata
Base58 enkoder / dekoder
Kodirajte i dekodirajte tekst koristeći Base58 kodiranje (koristi se u Bitcoin-u, IPFS-u)
GZip procesor
GZip kompresija visokih performansi sa naprednim nivoima
Base32 Encoder / Decoder
Encode and decode Base32 strings used in TOTP secrets and RFC 4648 applications
Bzip2 Decompressor
Decompress bzip2 (.bz2) files and Base64 or hex-encoded bzip2 data — instant client-side decompression
Formatters
JSON formater
Odmah formatirajte, ulepšajte i minifikujte JSON podatke. Validirajte JSON sintaksu, prikažite lepo formatiran JSON uz pravilno uvlačenje ili kompresujte JSON za efikasno skladištenje i prenos.
SQL formater
Formatirajte SQL podatke
XML formater
Uvucite ili minimizujte XML podatke
CSS formater
Formatiraj i ulepšaj CSS kod
JavaScript formater
Formatiraj i ulepšaj JavaScript kod
HTML formater
Formatiraj i ulepšaj HTML kod
TOML formater
Formatirajte i ulepšajte TOML konfiguracione fajlove
YAML formater
Formatirajte i ulepšajte YAML konfiguracione fajlove
Python Formatter
Format and beautify Python code with proper indentation and whitespace normalization
SCSS Formatter
Format and beautify SCSS/Sass code with proper indentation and nesting using Prettier
LESS Formatter
Format and beautify LESS stylesheets with proper indentation and nesting using Prettier
Generators
Generator heša / kontrolne sume
Izračunajte heš vrednosti i kontrolne sume iz teksta ili binarnih podataka koristeći MD5, SHA1, SHA256, SHA512 i još mnogo toga. Proverite integritet fajla i odmah generišite bezbedne heš kodove.
HMAC generator
Generišite HMAC potpise za API autentifikaciju, webhook-ove i integritet poruka koristeći SHA-1, SHA-256, SHA-384 ili SHA-512.
Bcrypt generator / validator
Generišite i proverite bcrypt heševe lozinki uz podesivi faktor troška
Lorem Ipsum generator
Generišite Lorem Ipsum (ili sličan) probni tekst
Lažni podaci / Faker generator
Generišite lažne podatke pomoću brzih šablona (Korisnik, Zaposleni, Proizvod, Porudžbina). Izvezite kao JSON, YAML, CSV ili SQL.
Generator lozinki
Generišite nasumične lozinke
UUID generator i dekoder
Generiši i dekodiraj UUID verzije 1, 4 (GUID), 6 i 7
QR kod enkoder / dekoder
Pročitajte ili generišite QR kod iz teksta. Može se izvesti kao SVG.
Generator za Basic Auth
Generišite HTTP Basic Authentication akreditive i Authorization zaglavlje
Kalkulator heša
Izračunajte heševe pomoću izvornih kripto algoritama (MD5, SHA256, SHA512, BLAKE2)
OTP generator (TOTP/HOTP)
Generišite jednokratne lozinke zasnovane na vremenu (TOTP) i brojaču (HOTP) za 2FA
Generator RSA para ključeva
Generišite RSA parove javnog/privatnog ključa u PEM formatu sa podesivom veličinom ključa i heš algoritmom
Meta Tag Generator (OG/Twitter)
Generate Open Graph and Twitter Card meta tags for your web pages with live social media previews
MAC Address Generator
Generate random MAC addresses in multiple formats for testing and development
Scrypt Hash Generator
Generate scrypt password hashes with configurable cost parameters for secure password storage
BIP39 Mnemonic Generator
Generate BIP39 mnemonic seed phrases for cryptocurrency wallets with 12 or 24 words
SVG Placeholder Generator
Generate lightweight SVG placeholder images with custom size, colours, and label text
Random Number Generator
Generate cryptographically random integers, floats, byte sequences, and big decimals via the Web Crypto API
Text
Eskepovanje / deeskepovanje teksta
Escape ili unescape stringova radi uklanjanja specijalnih znakova koji mogu sprečiti parsiranje. Podržava JSON, JavaScript, XML i HTML escaping za bezbedno rukovanje stringovima.
Poređenje lista
Uporedite dve liste
Alatke za rad sa linijama
Sortirajte redove, uklonite razmake i filtrirajte redove iz teksta
HTML pregled
Pregledajte HTML kod u pregledu uživo u pregledaču
Markdown pregled
Pregledajte Markdown dokument uz prikaz sličan GitHub-u
Analizator teksta i alati
Analizirajte tekst i koristite osnovne pomoćne alate
Upoređivač teksta
Uporedite dva teksta
Zamena niza
Pronađite i zamenite tekst uz podršku za regex
Mermaid Diagram Editor
Write Mermaid diagram syntax and see a live preview of flowcharts, sequence diagrams, class diagrams, and more
Defang / Fang URLs & IPs
Defang URLs and IP addresses for safe sharing in security reports and tickets
Extract URLs / Emails / IPs
Extract all URLs, email addresses, and IP addresses from any text for log analysis and threat hunting
URL Slug Generator
Convert any text to a URL-friendly slug with Unicode support and configurable separators
Prefix / Suffix Lines
Add a prefix or suffix to every line of text for bulk text manipulation
ASCII Art Text Generator
Convert text to ASCII art using FIGlet fonts for terminals, comments, and README files
Emoji Picker & Search
Browse, search, and copy any Unicode emoji by keyword or category
String Obfuscator / PII Masker
Mask emails, credit cards, phone numbers, IPs, and JWTs from any text — all processing happens in your browser
Documents
Testers
JSONPath tester
Testirajte JSONPath
Validator JSON šeme
Validirajte JSON podatke u odnosu na JSON šemu (draft-04, draft-06, draft-07, 2019-09) uz detaljno izveštavanje o greškama
Validator IBAN-a
Validirajte međunarodne brojeve bankovnih računa (IBAN) pomoću kontrolne sume i dužine
Tester regularnih izraza
Validirajte i testirajte regularne izraze
Tester XSD regex obrazaca
Testirajte XSD (XML Schema Definition) regex obrasce
URL парсер
Parsiranje i analiza URL komponenti, parametara upita i strukture
XML validator
Validirajte sintaksu i strukturu XML podataka.
Parser User Agent-a
Parsiranje i analiza User-Agent stringova radi izdvajanja informacija o pregledaču, OS-u i uređaju
Парсер ниске упита
Parsiranje i dekodiranje parametara URL query string-a
XML / XSD validator
Validirajte XML dokumente u odnosu na XSD šeme na mreži. Proverite XML sintaksu, potvrdite usklađenost sa šemom, testirajte validaciju namespace-a i obezbedite da vaši XML fajlovi ispunjavaju standarde na nivou preduzeća.
Provera jačine lozinke
Proverite jačinu lozinke, entropiju, vreme probijanja i dobijte bezbednosne preporuke
JSONata Expression Tester
Test JSONata expressions against JSON data with live results and debug JSON queries
Phone Number Parser
Parse and validate international phone numbers with country detection and format conversion
Keyboard Keycode Viewer
Press any key to see its JavaScript keycode, key, code, and which values for debugging keyboard events
JSON Diff Viewer
Compare two JSON documents side by side and see exactly what changed
XPath Tester
Test XPath expressions against XML or HTML documents with real-time results
CSS Selector Tester
Test CSS selectors against HTML and see matching elements instantly
Email Normalizer
Normalize and deduplicate email addresses by stripping Gmail dots, plus aliases, and standardizing case
Colors
Birač boja i konvertor
Birajte boje i konvertujte između formata HEX, RGB, HSL i HSV
Kalkulator kontrasta boja
Izračunajte odnos kontrasta boja i proverite usklađenost sa WCAG smernicama pristupačnosti
Simulator daltonizma
Simulirajte daltonizam na slikama za testiranje pristupačnosti
Color Palette Generator
Generate harmonious color palettes with complementary, analogous, triadic, and tetradic color schemes
Tints & Shades Generator
Generate lighter tints and darker shades from any base color for UI design and branding
Color Palette Extractor
Extract dominant colors from any image and get the main color palette with HEX, RGB, and HSL values
Images
Konvertor slika
Konvertor slika bez gubitaka
Kompresor slika
Kompresujte PNG i JPEG slike da biste smanjili veličinu fajla
Promena veličine slika
Promenite dimenzije slika po dimenzijama ili procentu
Alat za isecanje slika
Isecite slike izborom pravougaonog područja
Uokviravanje slike
Uklopite sliku u platno uz letterbox/pillarbox popunu
Procesor slika
Visokoperformansna obrada slika uz AVIF/HEIF kompresiju. Optimizujte slike, konvertujte formate i smanjite veličine fajlova uz mogućnosti obrade na nivou preduzeća.
References
HTTP Status Codes Reference
Look up any HTTP status code with descriptions, categories, and usage guidance. Complete reference for 1xx, 2xx, 3xx, 4xx, and 5xx codes — free online tool.
MIME Types Lookup
Look up MIME types by type name or file extension. Search all 2500+ registered MIME types with extensions, compressibility, and source — free online reference.
Git Command Finder
Find the exact git command for your scenario — undo a commit, delete a branch, recover lost work, stash, rebase, cherry-pick. 40+ recipes with explanations and safety warnings.
Calculators
Math Expression Evaluator
Evaluate mathematical expressions with variables, functions, and unit conversions
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number instantly
Entropy Calculator
Calculate Shannon entropy and character frequency distribution of any text or data
Checksum Calculator
Calculate CRC-8, CRC-16, CRC-24, CRC-32, Adler-32 checksums and validate Luhn (credit card) numbers
Tehnički detalji
Free Online Developer Tools — DevToys Web Pro
What DevToys Web Pro Is
DevToys Web Pro is a free, browser-based collection of developer tools covering every common task: format and validate JSON, encode and decode Base64, generate UUIDs, decode JWT tokens, test regular expressions, convert between data formats, hash strings, generate QR codes, compress images, and more — all without installing software or sending data to a server. Every tool runs entirely in your browser using JavaScript and WebAssembly, so your code, credentials, and sensitive data never leave your machine.
Tool Categories
Tools are organized into eight categories. Formatters: JSON formatter, SQL formatter, XML formatter, CSS formatter, HTML formatter, JavaScript formatter, YAML formatter, TOML formatter. Encoders & Decoders: Base64 encoder/decoder, URL encoder/decoder, JWT decoder, HTML entity encoder, hex/ASCII converter, Base58, gzip, quoted-printable. Generators: UUID/GUID generator, password generator, QR code generator, hash generator, HMAC generator, RSA key generator, bcrypt generator, lorem ipsum generator, TOTP/OTP generator. Converters: JSON to YAML, JSON to CSV, JSON to TOML, cron expression parser, chmod calculator, date converter, number base converter, curl-to-code, markdown to HTML. Testers: regex tester, JSON Schema validator, JSONPath tester, XML/XSD validator, URL parser, query string parser, IBAN checker, password strength checker. Text tools: markdown preview, text diff/comparer, text analyzer, string replacer, list compare. Image tools: image compressor, image converter, image resizer, image cropper. Network tools: IPv4 subnet calculator, IPv4 range expander, IPv6 parser.
Privacy — Your Data Stays in Your Browser
Unlike many online developer tools that send your input to remote servers for processing, DevToys processes everything locally. When you format JSON, decode a JWT, test a regex, or hash a string, the computation runs in your browser tab using the same JavaScript engine and Web Crypto API that power modern web applications. No data is transmitted, no inputs are logged, and the tools continue working offline after the page loads. This makes DevToys safe to use with JWT tokens, API keys, private keys, credentials, and any other sensitive developer data.
Browser Tool vs Local App
DevToys Web Pro works instantly in any browser with no installation, no login, and no configuration. It is also available as a Progressive Web App (PWA) for offline use, and as a browser extension for Chrome, Firefox, and Edge that puts all tools in your new-tab page. For teams, the web version requires no software deployment — share a URL and anyone on any OS can use the tools immediately. Compared to running scripts locally or configuring VS Code extensions, DevToys is faster to access for one-off formatting, decoding, or conversion tasks.