132 free tools, 114 run in your browser
Free Online Tools
Fast, private tools for developers, designers and everyday tasks. Most run entirely in your browser, with no uploads and no account required.
Popular Tools
The ones people open most.
- Image CompressorCompress JPG, PNG and WebP images online, without uploading them to a server.Runs in your browser
- PDF CompressorShrink a PDF for email and upload limits: processed locally, never uploaded.Runs in your browser
- JSON Formatter & ValidatorFormat, validate and minify JSON with precise error locations.Runs in your browser
- QR Code GeneratorCreate a QR code for any link or text and download it as PNG, free, no signup.Runs in your browser
- DNS CheckerLook up A, AAAA, CNAME, MX, NS and TXT records for any domain in one shot.Live check
- Website Health CheckerOne scored report: uptime, SSL, DNS, speed, redirects, security headers, SPF and DMARC.Live check
- Image CompressorCompress JPG, PNG and WebP images online, without uploading them to a server.Runs in your browser
- Image ResizerResize images to exact pixel dimensions in your browser, free and private.Runs in your browser
- Compress Image to Target SizeHit an exact file size: compress an image to 100 KB, 50 KB or any target you need.Runs in your browser
- WebP ConverterConvert JPG or PNG to WebP, and WebP back to JPG or PNG, in your browser.Runs in your browser
- JPG to PNG ConverterConvert JPG images to PNG (and PNG to JPG) instantly in your browser.Runs in your browser
- Image to Base64Turn an image into a Base64 data URI for embedding in HTML, CSS or JSON.Runs in your browser
- Base64 to ImageDecode a Base64 string or data URI back into a viewable, downloadable image.Runs in your browser
- Favicon GeneratorOne logo in, every favicon size out: browser tabs, iOS, Android, plus the HTML snippet.Runs in your browser
- Aspect Ratio CalculatorFind any image or video’s ratio and scale it to new dimensions without distortion.Runs in your browser
- SVG to PNG ConverterTurn an SVG into a PNG at any size, rendered in your browser and never uploaded.Runs in your browser
- PNG to JPG ConverterConvert PNG to JPG in your browser, with a white background where the transparency was.Runs in your browser
- JPG to WebP ConverterConvert JPG to WebP in your browser, usually for a quarter to a third off the file size.Runs in your browser
- WebP to JPG ConverterTurn a WebP into a JPG that older software will actually open.Runs in your browser
- Photo CropperCrop to a square, a story, a wide banner or freehand, without uploading the photo.Runs in your browser
- PDF CompressorShrink a PDF for email and upload limits: processed locally, never uploaded.Runs in your browser
- Merge PDFCombine multiple PDFs into one file, in the order you choose: privately in your browser.Runs in your browser
- JPG to PDF ConverterTurn JPG and PNG images into a single PDF: locally, with no upload.Runs in your browser
- Split PDFExtract exactly the pages you need from a PDF: ranges like 1-3, 5, 8- understood.Runs in your browser
- Rotate PDFFix sideways or upside-down scans: rotate every page in one click.Runs in your browser
- PNG to PDF ConverterTurn PNG screenshots into one PDF, in order, without uploading them.Runs in your browser
- PDF to JPG ConverterEvery page of a PDF as a JPG image, rendered in your browser at the quality you pick.Runs in your browser
- PDF to PNG ConverterEvery page of a PDF as a lossless PNG, which keeps text and diagrams sharp.Runs in your browser
- JSON Formatter & ValidatorFormat, validate and minify JSON with precise error locations.Runs in your browser
- JWT DecoderDecode a JWT’s header and payload instantly: locally, without your token leaving the page.Runs in your browser
- Base64 Encoder / DecoderEncode text to Base64 or decode it back, with full Unicode support, locally.Runs in your browser
- UUID GeneratorGenerate cryptographically random UUID v4 identifiers: one or hundreds at once.Runs in your browser
- Hash GeneratorSHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text: computed locally.Runs in your browser
- URL Encoder / DecoderPercent-encode or decode URLs and query parameters, with the component/full distinction done right.Runs in your browser
- Unix Timestamp ConverterConvert Unix timestamps to readable dates and back: seconds or milliseconds, auto-detected.Runs in your browser
- CSV to JSON ConverterTurn CSV exports into a JSON array of objects: quotes, delimiters and headers handled properly.Runs in your browser
- JSON to CSV ConverterFlatten a JSON array of objects into a spreadsheet-ready CSV.Runs in your browser
- Regex TesterTest JavaScript regular expressions live: matches, indices and capture groups as you type.Runs in your browser
- Text Diff CheckerCompare two texts line by line: additions and deletions highlighted.Runs in your browser
- HTTP Status Code LookupEvery HTTP status code explained: searchable, with what each one actually means in practice.Runs in your browser
- Markdown PreviewWrite markdown, see rendered HTML live: sanitized and local.Runs in your browser
- HTML Entity Encoder / DecoderEscape HTML for safe display, or decode &-style entities back to text.Runs in your browser
- JSON MinifierStrip every unnecessary byte from JSON: validated, minified, one click.Runs in your browser
- XML FormatterPretty-print or minify XML, with well-formedness validation first.Runs in your browser
- YAML to JSON ConverterTurn YAML configs into JSON: indentation quirks resolved by a real parser.Runs in your browser
- JSON to YAML ConverterTurn JSON into clean, readable YAML for configs and pipelines.Runs in your browser
- SQL FormatterTurn one-line SQL into readable, consistently indented queries: dialect-aware.Runs in your browser
- Markdown to HTML ConverterConvert markdown into clean, sanitized HTML source you can paste anywhere.Runs in your browser
- JSON DiffCompare two JSONs by meaning: key order and formatting ignored, real changes listed by path.Runs in your browser
- URL ParserExplode any URL into protocol, host, path and a decoded query-parameter table.Runs in your browser
- IP Subnet CalculatorCIDR in: network, broadcast, mask, host range and usable host count out.Runs in your browser
- Number Base ConverterBinary, octal, decimal, hex: one number, all four bases, live.Runs in your browser
- CSS MinifierStrip comments and whitespace from CSS, safely, and see exactly how much smaller it got.Runs in your browser
- HTML MinifierCollapse whitespace and strip comments from HTML, without touching pre, textarea, script or style.Runs in your browser
- HTML FormatterIndent minified or machine generated HTML so you can actually read the structure.Runs in your browser
- Word CounterCount words, characters, sentences and reading time: live as you type.Runs in your browser
- Character CounterLive character count with platform limits: tweets, meta descriptions, SMS and more.Runs in your browser
- Case ConverterConvert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case and kebab-case.Runs in your browser
- URL Slug GeneratorTurn any title into a clean, SEO-friendly URL slug.Runs in your browser
- Remove Duplicate LinesDeduplicate a list in one click: keeps the first occurrence, preserves order.Runs in your browser
- Sort LinesSort a list A→Z or Z→A with natural number ordering and optional dedupe.Runs in your browser
- Whitespace CleanerStrip messy spacing: trim line edges, collapse double spaces, drop empty lines.Runs in your browser
- Reading Time CalculatorHow long your article takes to read: at four real reading speeds.Runs in your browser
- Find & ReplaceReplace every occurrence in one pass: plain text or regex, case-sensitive or not.Runs in your browser
- Invisible Character DetectorFind the zero-width spaces and hidden Unicode breaking your text, and clean them out.Runs in your browser
- Typing Speed TestWords per minute and accuracy over one minute, with the errors marked as you type.Runs in your browser
- QR Code GeneratorCreate a QR code for any link or text and download it as PNG, free, no signup.Runs in your browser
- Password GeneratorCryptographically random passwords with a real entropy estimate: generated locally.Runs in your browser
- Lorem Ipsum GeneratorClassic placeholder text by the paragraph, for mockups that need realistic body copy.Runs in your browser
- Random String GeneratorCrypto-random strings in bulk: hex, alphanumeric, digits or Base58.Runs in your browser
- .gitignore GeneratorTick your stack: get a combined .gitignore that keeps junk and secrets out of git.Runs in your browser
- Robots.txt GeneratorA correct robots.txt in seconds: allow-with-exceptions or block-everything staging mode.Runs in your browser
- Cron Expression GeneratorBuild cron schedules from presets, and read any expression back in plain English.Runs in your browser
- Random Number GeneratorRandom numbers in any range, with or without repeats, drawn from your browser crypto source.Runs in your browser
- Invoice GeneratorA clean PDF invoice with line items and tax, built on your device and never uploaded.Runs in your browser
- CSS Gradient GeneratorDesign a linear or radial gradient visually: copy the CSS in one click.Runs in your browser
- Box Shadow GeneratorDial in the perfect CSS shadow with sliders and a live preview.Runs in your browser
- Placeholder Image GeneratorCustom-size placeholder PNGs with your colors and text: drawn locally, no external service.Runs in your browser
- Image Color PickerClick anywhere on an image to grab its exact color. HEX, RGB and HSL.Runs in your browser
- Color Contrast CheckerWCAG contrast ratio between text and background, with live AA/AAA verdicts.Runs in your browser
- HEX ↔ RGB ↔ HSL ConverterAny color in, all three formats out, with a live swatch.Runs in your browser
- PX to REM ConverterPixels to rem at any root size, with a cheat-sheet for common values.Runs in your browser
- Meta Tag GeneratorGenerate a complete, correct head block: title, description, canonical, Open Graph and Twitter cards.Runs in your browser
- Google SERP PreviewSee how your title and description will look in Google results, before you publish.Runs in your browser
- Keyword Density CheckerWhat a page is actually about, as word and phrase counts, with the filler words left out.Runs in your browser
- Schema Markup GeneratorValid JSON-LD for Organization, LocalBusiness, Article, Product or FAQ, ready to paste into the head.Runs in your browser
- XML Sitemap GeneratorPaste a list of URLs and get a valid sitemap.xml, deduplicated and properly escaped.Runs in your browser
- UTM Link BuilderTagged campaign URLs with consistent casing, so your analytics does not split one campaign into four.Runs in your browser
- Security Headers CheckerScore any site’s security headers. HSTS, CSP, X-Frame-Options and more, with fixes.Live check
- CSP AnalyzerPaste a Content-Security-Policy: get its directives decoded and its weaknesses flagged.Runs in your browser
- Cookie Security CheckerAudit a site’s Set-Cookie flags. Secure, HttpOnly and SameSite, cookie by cookie.Live check
- HSTS CheckerVerify a site’s Strict-Transport-Security header: max-age, subdomains and preload readiness.Live check
- CORS CheckerTest any endpoint’s CORS from a chosen origin: see exactly what the browser sees.Live check
- Password Strength CheckerAn honest strength verdict: entropy plus the human patterns crackers try first.Runs in your browser
- DNS CheckerLook up A, AAAA, CNAME, MX, NS and TXT records for any domain in one shot.Live check
- DNS Propagation CheckerSee whether your DNS change has reached Google, Cloudflare, Quad9 and other resolvers worldwide.Live check
- DMARC & SPF CheckerCheck whether your domain’s email is protected by SPF and DMARC, and how strictly.Live check
- IP Lookup (Reverse DNS)Find the PTR hostname behind any public IP address.Live check
- WHOIS LookupWho registered a domain, where, and when it expires: the live registry record.Live check
- DKIM CheckerVerify your DKIM public key is published correctly at its selector.Live check
- Email ValidatorCheck an address’s format and whether its domain can actually receive mail.Live check
- SSL CheckerCheck any site’s SSL certificate: validity, expiry date, issuer and chain.Live check
- HTTP Header CheckerInspect any URL’s response headers and get a security-header report card.Live check
- Redirect CheckerFollow a URL’s full redirect chain hop by hop: statuses, targets and timing.Live check
- Website Health CheckerOne scored report: uptime, SSL, DNS, speed, redirects, security headers, SPF and DMARC.Live check
- Robots.txt CheckerFetch and lint any site’s robots.txt: catch the Disallow that deindexes you.Live check
- Sitemap CheckerValidate any sitemap.xml live: type, URL count and the errors crawlers would hit.Live check
- Open Graph CheckerSee exactly which social tags a live page ships, and what WhatsApp and LinkedIn will miss.Live check
- GST Calculator (India)Add or remove GST at 5, 18 or 40 percent or a custom rate, with the CGST/SGST split shown.Runs in your browser
- EMI CalculatorMonthly EMI, total interest and total outgo for any loan: the same formula banks use.Runs in your browser
- SIP CalculatorProject a monthly SIP’s future value: invested amount vs estimated gains, honestly labeled.Runs in your browser
- Compound Interest CalculatorA = P(1+r/n)^nt: maturity value at any compounding frequency, FD-style.Runs in your browser
- CAGR CalculatorThe honest annual growth rate between two values: compare investments across different periods.Runs in your browser
- FD CalculatorFixed deposit maturity and interest, with the quarterly compounding Indian banks actually use.Runs in your browser
- RD CalculatorRecurring deposit maturity, with each instalment compounded for the time it is actually invested.Runs in your browser
- PPF CalculatorPublic Provident Fund maturity over fifteen years, with the year by year balance.Runs in your browser
- Home Loan EMI CalculatorMonthly EMI, total interest and what share of the repayment is interest rather than principal.Runs in your browser
- Gratuity CalculatorGratuity under the Payment of Gratuity Act, with the formula figure and the statutory ceiling side by side.Runs in your browser
- HRA Exemption CalculatorHow much house rent allowance is exempt, and which of the three rules is the one capping it.Runs in your browser
- Simple Interest CalculatorSimple interest and the total amount, with what compounding would have added shown alongside.Runs in your browser
- Lumpsum CalculatorWhat a one time investment grows to at an assumed rate, with the value at the end of every year.Runs in your browser
- Profit Margin CalculatorMargin and markup from cost and price, because they are different numbers and mixing them up costs money.Runs in your browser
- ROI CalculatorReturn on investment, plus the annualised figure that makes two investments actually comparable.Runs in your browser
- Percentage CalculatorWhat is X% of Y, and X is what % of Y, answered live.Runs in your browser
- Percentage Change CalculatorIncrease or decrease between two values, as a percentage: the right formula, live.Runs in your browser
- Age CalculatorExact age in years, months and days, plus total days and your next birthday.Runs in your browser
- Date Difference CalculatorDays between two dates: calendar days, weekdays and full weeks.Runs in your browser
- Data Size ConverterBytes to KB, MB, GB, TB, with the decimal vs binary (KiB/MiB) story told straight.Runs in your browser
- Bandwidth / Download Time CalculatorHow long a file takes at your connection speed, with the megabits vs megabytes trap defused.Runs in your browser
- Temperature ConverterCelsius, Fahrenheit and Kelvin: converted live, with absolute zero respected.Runs in your browser
- Length ConverterMillimeters to miles: metric and imperial lengths converted live in one table.Runs in your browser
- Weight ConverterGrams, kilograms, pounds, ounces and stone: converted live in one table.Runs in your browser
- PPI CalculatorPixel density from resolution and screen size: is that display actually sharp?Runs in your browser
- Roman Numeral ConverterNumbers to roman numerals and back, with validation of proper form.Runs in your browser
- BMI CalculatorBody mass index from height and weight, with the healthy weight range for your height.Runs in your browser
- Stopwatch and TimerA stopwatch with laps and a countdown timer that beeps, both in one tab.Runs in your browser
- Discount CalculatorWhat you pay and what you save, including a second discount and GST if they apply.Runs in your browser
- Time Zone ConverterOne moment shown in several time zones at once, with daylight saving handled rather than assumed.Runs in your browser
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Whenever possible, your files are processed directly inside your browser and never uploaded to BitsSolved. No uploads. No account required.
Tell us what you need built.
The first call is free and is mostly us asking questions. After it you get the scope in writing and a fixed quote for the first phase.