Free Online Tools

Ika Toolbox offers 76 free online tools for text editing, encoding, code formatting, encryption, image and network utilities. Everything runs in your browser — no uploads, no sign-up, just open and use.

Encoding / Decoding ›

Base64 Encode / DecodeLocalEncode text to Base64, or decode Base64 back to text.
Hex Encode / DecodeLocalConvert text to hex, or hex back to text.
URL Encode / DecodeLocalPercent-encode text, or decode a URL back to text.
ROT13 Encoder / DecoderLocalApply ROT13 or a custom Caesar shift to text.
Base32 Encode / DecodeLocalEncode text to Base32 (RFC 4648), or decode Base32 back to text.
SQL Escape ToolLocalEscape or unescape a string for safe use inside a SQL string literal.
HTML Escape / UnescapeLocalEscape HTML entities, or convert entities back to characters.
JSON Escape / UnescapeLocalEscape text into a valid JSON string, or unescape it back.
JWT Decoder & Generator – Decode or Create JSON Web TokensLocalDecode the header and payload of a JWT, or generate a signed JWT, entirely in your browser.

Formatting ›

JSON FormatterLocalFormat, minify and validate JSON in your browser.
YAML to JSON ConverterLocalConvert between YAML and JSON instantly in your browser.
JSON ViewerLocalVisualize JSON as an interactive graph or a collapsible tree in your browser.
CSS MinifierLocalMinify or beautify CSS instantly in your browser.
Duplicate FinderLocalFind repeated lines or words and count them in your browser.
Diff ViewerLocalCompare two texts character by character with inline highlighting and a similarity score.
RegEx TesterLocalTest and highlight regular expressions live in your browser.
JSON to ExcelLocalConvert JSON to a flattened spreadsheet and download it as an xlsx file.
Markdown to HTML Converter – Free OnlineLocalConvert Markdown to clean HTML with a live preview, entirely in your browser.
CSV to JSON Converter – Free OnlineLocalUpload or paste a CSV file and convert it to highlighted JSON (or JSON back to CSV), entirely in your browser.
JavaScript FormatterLocalFormat JS, JSX, TS and TSX code instantly in your browser.
HTML FormatterLocalBeautify HTML with clean indentation right in your browser.
JSON to TypeScriptLocalGenerate TypeScript interfaces from JSON in your browser.

Conversion ›

Case ConverterLocalConvert text to uppercase, lowercase, title case, or sentence case.
Unix Timestamp ConverterLocalConvert a Unix timestamp to a readable date, or a date to a Unix timestamp.
Number Base ConverterLocalConvert integers between any bases from 2 to 36.
Roman Numerals ConverterLocalConvert between Roman numerals and numbers from 1 to 3999.
Unit ConverterLocalConvert length, weight, temperature, and data-size units.
UUID GeneratorLocalGenerate v4 UUIDs in your browser, in bulk — no uploads.
Cron Expression Generator & SchedulerLocalTurn cron expressions into plain English, preview the next run times, and build a cron job visually.
Color Converter – HEX, RGB & HSLLocalConvert between HEX, RGB and HSL and preview the color instantly, entirely in your browser.
Number to Words – Convert Numbers into English WordsLocalType a number and read it out as English words instantly, entirely in your browser.
Credit Card Number Validator & Checker – Free OnlineLocalValidate a credit card number with the Luhn algorithm and detect its brand, entirely in your browser.
Naming Convention ConverterLocalConvert identifiers between camelCase, PascalCase, snake_case, kebab-case and more.
Timezone ConverterLocalSee one moment in several timezones at once, with UTC offsets and working-hours hints.

Text ›

Word CounterLocalCount characters, words, Chinese characters, lines, and paragraphs. Emoji count correctly.
Character ReplaceLocalFind and replace text or regex, with live preview and one-click copy.
Password GeneratorLocalGenerate random, secure passwords in your browser with a click — no uploads.
Reverse TextLocalReverse text by character, word, or line order.
Sort Text LinesLocalSort lines alphabetically, by length, or in reverse.
Deduplicate LinesLocalRemove duplicate lines from your text while keeping the first occurrence order.
Remove LinesLocalFilter out empty lines, duplicate lines, or any line containing a keyword.
Truncate TextLocalCut text to a set length by characters or words, with an optional ellipsis.
Extract EmailsLocalPull every email address out of a block of text.
Extract URLsLocalFind every http(s) and www link inside a block of text.
AlphabetizeLocalSort a comma, line, or space separated list in alphabetical order.
Lorem Ipsum Generator – Free Placeholder TextLocalGenerate Lorem Ipsum placeholder text by paragraphs, sentences or words, in your browser.
Password Strength CheckerLocalCheck how strong a password is and get entropy, crack-time estimates and concrete tips — computed entirely in your browser, nothing uploaded.

Network ›

Subnet Calculator – CIDR, Subnet Mask & IP RangeLocalCalculate network address, broadcast address, host range and usable hosts from a CIDR prefix or subnet mask.
HTTP Status Codes – Full List & MeaningsLocalSearch a full list of HTTP status codes with their meanings, entirely in your browser.
URL Parser – Break Down Any URLLocalParse a URL into protocol, host, port, path, query parameters and hash, and rebuild it after editing. Runs entirely in your browser.
MIME Type Lookup – File Extension to MIME TypeLocalLook up the MIME type for a file extension or find the extensions for a MIME type, covering images, audio, video, documents, fonts, archives and 3D models. Fully offline.
User-Agent Parser – Detect Browser, Engine, OS & DeviceLocalPaste any User-Agent string and instantly see the browser, rendering engine, operating system, device type and CPU architecture. Fully offline.

Encryption / Decryption ›

Hash GeneratorLocalCompute MD5, SHA-1, SHA-256 and SHA-512 hashes in your browser — no uploads.
TOTP Generator – 2FA Authenticator CodeLocalGenerate time-based one-time passwords (TOTP) from a base32 secret.
AES Encrypt / Decrypt Online – AES-256 Text EncryptionLocalEncrypt or decrypt text with AES-256-GCM using a passphrase.
BCrypt Hash Generator & Verify – Free OnlineLocalHash a password with bcrypt and verify a password against a bcrypt hash, entirely in your browser.
HMAC GeneratorLocalCompute HMAC signatures with MD5, SHA-1, SHA-256 or SHA-512 in your browser — nothing is uploaded.
RSA & EC Key Pair Generator – Generate PEM / JWK Keys OnlineLocalGenerate RSA (2048/3072/4096) or ECDSA (P-256/P-384) key pairs locally in your browser and export them as PEM or JWK.

Image ›

Image Resizer & CompressorLocalResize and compress images in your browser with a live preview.
AI Background RemoverLocalRemove image backgrounds in your browser and export a transparent PNG.
Image Converter – PNG, JPEG & WebPLocalConvert images between PNG, JPEG and WebP formats with quality control.
Favicon Generator – Create Favicon PNGs from Image or TextLocalGenerate favicon PNG files at standard sizes from an image or text.
Image to Base64 – Convert Images to Base64 / Data URILocalConvert an image to a Base64 string or data URI — or convert Base64 back to an image — entirely in your browser.
Image Cutter & SlicerLocalSlice one image into a grid of tiles and download them one by one or as a ZIP.
Image Collage MakerLocalCombine multiple images into one picture with grid, strip and even triangle or diagonal layouts, then export PNG or JPEG.
Image Annotate & WatermarkLocalRedact areas with a mosaic, tile a watermark, and draw arrows or text on any image — all processed locally in your browser.

More ›

Video Script EditorLocalWrite short-video scripts with drag-and-drop shot cards, audio clips, and visual assets.
WhiteboardLocalA free online whiteboard with an infinite canvas — drawings stay in your browser.
Voice RecorderLocalRecord a script sentence by sentence with trimming and MP3/WAV export.
Multi-screen Player – Split Canvas Video MonitorLocalPlace several local files or URLs onto one composite canvas with preset layouts and sync play, pause, restart and seek across all regions.
QR Code Generator – Free OnlineLocalGenerate a QR code from any text or URL instantly, entirely in your browser. Download it as a PNG.
QR Code Decoder / Reader – Free OnlineLocalUpload an image containing a QR code and decode it to text instantly, entirely in your browser.
CSS Gradient Generator – Linear, Radial & ConicLocalBuild linear, radial and conic CSS gradients with a live preview, then copy the ready-to-use background-image code.
CSS Box Shadow Generator – Multi-layer & InsetLocalVisually craft CSS box-shadow with multiple layers, color and opacity, and inset support, then copy the ready-to-use code.
Screen RecorderLocalRecord your screen, window or tab locally and download a WebM.
Hard Subtitle ExtractorLocalRecognise hard-coded (burned-in) subtitles frame by frame in your browser and export an editable SRT / VTT / TXT / JSON file — no upload, nothing stored in the browser.