Validate by URL

URL:

Validate by File Upload

File:

(Can not accept so big file/Internal Server Error occurs May not check a file-name with Japanese)

Validate by direct input

(Can not check the coincidence of character code at DATA block definition )

HTML version

	HTML version
1	HTML1.0	Grammar
2	HTML 2.0 (RFC1866)	Grammar
3	HTML2.x (Rfc2070)	Grammar
4	HTML +	Grammar
5	HTML3.0	Grammar
6	HTML 3.2	Grammar
7	HTML 4.0 Strict	Grammar
8	HTML 4.0 Transitional	Grammar
9	HTML 4.0 Frameset	Grammar
10	HTML 4.0 Mobile	Grammar
11	HTML 4.01 Strict	Grammar
12	HTML 4.01 Transitional	Grammar
13	HTML 4.01 Frameset	Grammar
14	XHTML 1.0 Strict	Grammar
15	XHTML 1.0 Transitional	Grammar
16	XHTML 1.0 Frameset	Grammar
17	XHTML1.1	Grammar
18	HTML5	Grammar
19	XHTML + RDFa 1.0	Grammar
20	XHTML Basic	Grammar
21	XHTML Mobile Profile	Grammar
22	ISO / IEC 15 445	Grammar
23	ISO / IEC 15 445 Preparation	Grammar
24	Netscape Navigator 2.0	Grammar
25	Netscape Navigator 3.0	Grammar
26	Netscape Navigator 4.0	Grammar
27	Microsoft Internet Explorer 3.0 beta	Grammar
28	Microsoft Internet Explorer 3.0	Grammar
29	Microsoft Internet Explorer 4.0	Grammar
30	Microsoft Internet Explorer 5.0	Grammar
31	Microsoft Internet Explorer 5.5	Grammar
32	IBM WebExplorer 1.1	Grammar
33	Compact HTML	Grammar
34	NTT DoCoMo iMode 1.0	Grammar
35	NTT DoCoMo iMode 2.0	Grammar
36	NTT DoCoMo iMode 3.0	Grammar
37	NTT DoCoMo iMode 4.0	Grammar
38	NTT DoCoMo iMode XHTML 1.0	Grammar
39	NTT DoCoMo iMode XHTML 1.1	Grammar
40	J-Skyweb	Grammar
41	J-Station Skyweb	Grammar
42	TTNet Doti	Grammar
43	HTML for the application of patent	Grammar

CHECK-OPTION

Enable all of checks as bellow. At this time, each designations are ignored. That is all.

All eligious checks are ignored. They are with (*) mark.

The mild check, which is showed on WAI Content Accessibility Guidelines, is ignored. They are with (@) mark.

Specified detail Option

The top of number shows 0 to 9 as the rough importance/ It's not point-deduction scoring. The small number means lite and closer to 9 becomes fatal.

	Severity	Conditions
1	5	If the link in HTML (http: only) is not existing, it will be warned . It takes time to check the many links in the HTML. When DATA area is not specified, checked, it will be no check.
	Timeout sec. /The existance to link (linked pages is not checked when zero sec. is specified). Check by get request when HEAD request is failed.
2	8	If without any DOCTYPE declaration, WARNING.
3	3	WARNING If it is including the DOCTYPE declaration before a control characterDOCTYPE.
4	5	When unknown DOCTYPE declaration, warning.
5	8	If the text case is different at the public identifier(FPI ) , warning.
6	1	If unsupported DOCTYPE declaration , warning.
7	8	If it's already been discarded DOCTYPE declaration , warning.
8	0	Prompting HTML4.0 to switch to HTML4.01
9	0	WARNING if inconsistent DOCTYPE declaration between the HTML and HTML version of the selected.
10	9	Warning if the DOCTYPE declaration appears at anywhere except on the top of the document
11	7	If it's not small letter in case the HTML DOCTYPE declaration of XHTML, WARNING.
12	7	If DOCTYPE declaration is not capitalized, warning .
13	8	Warning if without any system identifier in XHTML.
14	8	Warning if system identifier is not correct.
15	7	If the text case is different at the symantec system ID , warning.
16	1	Warning if SGML declaration or DTD declaration appears .
17	0	Warning if marked intervals appear. Not be penalized.
18	9	Warning if the prohibited letter in writing is including.
19	9	Warning if marked intervals is not closed.
20	9	Warning if XML declaration appears at anywhere except on the top of the document.
21	6	Warning if there is no XML declaration in XHTML.
22	9	Warning if XML declaration has not been finished by ?>
23	9	Warning if XML declaration is not correct.
24	0	Warning the processing instruction. Not be penalized.
25	2	Warning if -- is including in comments.
26	9	Warning if -- is including in comments, more than HTML4 .
27	2	Warning if it is empty in comments <!> Warning if it is empty in comments.(*)
28	9	Warning if it is not correct in comments like <! ->.
29	3	Warning if the comment is written in <TITLE>.
30	0	Warning if <や> is including in comments. Not be penalized. (*)
31	3	Warning if nested comments.
32	2	Warning if the blank is including between -- and > in closed coments. (*)
33	8	Warning if -!> is written as closed coments.
34	9	Warning if the coment is not closed.
35	9	Warning if the tag is not closed.
36	9	Warning if the blank is including between < and the tag name.
37	7	Warning if unnecessary < is xisting in the tag.
38	8	Warning if the empty element tag is not closed in / XHTML.
39	1	Warning if without blank before the empty element tag is closed in / XHTML.
40	9	Warning if the blank is written at the empty element tag in XHTML.
41	1	Warning if the empty element tag is written as<tag></ tag> in XHTML.
42	9	Warning if the empty element tag is closed by> in / XHTML.
43	9	Warning if the tag, which must not be written by location, is written.
44	0	Warning if the tag, which must not be recommended to write by location, is written.
45	9	Warning if the tag, which must be written inside specified elements, is written at the outside.
46	8	Warning if the tag, which must be written once only, is written more than once.
47	8	Warning if both the tag is written in spite of that only one other tag must be written.
48	8	Warning if the wrong order of the tags.
49	1	Warning if <DD>leads to <DT> less than HTML4.
50	9	Warning if the necessary tag is not written.
51	1	Warning if nothing between the start tag and the end tag. (*)
52	0	Warning if only blanks between the start tag and the end tag (@)
53	0	Warning if only <BR> between the start tag and the end tag. (*)
54	8	Warning if the unknown tag is written.
55	7	Warning if the tag for another HTML is written.
56	1	Warning if the unrecommended tag is written.
57	0	Warning if the tag, which is good to use a style sheet, is written.
58	0	Warning if the unsupported tag is written.
59	6	Warning if the tag, which should not be used, is written.
60	9	Warning if the start tag, which should not be omitted, is omitted.
61	4	Warning if the start tag is omitted. But except for the case that next omission is tangible.
62	0	Warning if the start tag, which omission is tangible like <TBODY>, is omitted. Not be penalized.
63	9	Warning if the end tag, which should not be omitted, is omitted.
64	2	Warning if the end tag is omitted. But except for the case that next omission is tangible.
65	0	Warning if the start tag, which omission is tangible like </ LI> or </ DD> , is omitted. Not be penalized.
66	9	Warning when the attribute is specified at the end tag.
67	7	Warning if the end tag, which is not existing, is written.
68	0	Warning if unnecessary blanks between the start tag and the end tag. Not be penalized. (*)
69	9	Warning if the end tag, that the start tag is not existing, is written.
70	9	Warning if the nested relation of the tag is strange.
71	6	Warning if the nested tag is too deep.
72	9	Warning if the necessary end tag is not found.
73	9	Warning if text is written in the place where any entites except tags are not available to write.
74	8	Warning if the strange text is existing inside the tag.
75	7	Warning if the empty element tag is closed except /XHTML as /> .
76	0	Prompting uppercase/lowercase of Element names or attribute names to integrate. Not be penalized. (*)
77	9	WARNING if the element name is not written by small letters in XHTML.
78	9	WARNING if the attribute name is not written by small letters in XHTML.
79	6	Warning if unknown attribute is specified.
80	5	Warning if another attribute for HTML is specified.
81	1	Warning if the unrecommended attribute is written.
82	0	Warning if the attribute, which is good to use a style sheet, is written.
83	0	Warning if the attribute except supprt is written.
84	6	Warning if the attribute is not delimited by space.
85	7	Warning if the same attribute is repeated.
86	6	Warning if the necessary attribute is not specified.
87	5	Warning if the attribute, which should be specified simultaneously, is not specified.
88	5	Warning if the attribute, which should not be specified simultaneously, is specified.
89	5	Warning if the necessary attribute is omitted.
90	7	Warning when the attribute value is not specified.
91	0	Warning if the attribute value, which is enclosed by quotation marks,becomes over multiple lines. Not be penalized. (*)
92	0	Warnning If the space contains at back and forth of the attribute values, . Not be penalized(*)
93	9	Warning if the quotation mark of the attribute is not closed.
94	0	Warning if the attribute value is enclosed by single quotation marks '～' . Not be penalized.(*)
95	8	Warning if the attribute, which should be enclosed by quotation marks, is not enclosed.
96	1	Warning if the attribute, which is good to be enclosed by quotation marks, is not enclosed.
97	0	Prompting the attribute, which is not to be enclosed by quotation marks, to be enclosed. Not be penalized.(*)
98	1	Warnning If the space contains at back and forth of the attribute values, which preceded by a blank. (*)
99	1	Warning if the unrecommended attribute is written.
100	7	Warning when the attribute value, which can not be empty,becomes empty.
101	4	Warning if the attribute is too long.
102	7	Warning if the attribute is not correct.
103	7	Warning if the specified color is not correct.
104	0	Warning if the multiple URIs are written in PROFILE attribute. Not be penalized.
105	0	Warning if the unsafe attribute is written.
106	7	Warning if the text case is different at the attribute value in XHTML.
107	7	Warning if other values are written that the attribute value is fixed.
108	2	Urge to omit the attribute name If the attribute values and attribute names are the same.
109	8	Warning if the attribute name is omitted in XHTML.
110	3	Warning if the attribute values and the different attribute name are omitted.
111	7	Warning if entity reference had not end with semicolons.
112	1	Urge not to write entity reference '
113	7	Warning if you use X at hexadecimal character references in XHTML.
114	3	Warning if unknown entity reference is existing.
115	3	Warning when a character reference is a letter code, which exceed the limit.
116	3	Warning when an available character reference is used.
117	5	Warning to write < or & by using a character reference
118	0	Prompting to write the quotation in the text by using entity reference. Not be penalized.(*)
119	2	Prompting to specify the LANG attribute at <HTML> tag.(@)
120	2	Warning if the lang attribute value and the xml lang: attribute value are different.
121	1	Warning if the lang attribute value and the xml lang: attribute value are different.
122	0	Warning if the specified lang attribute and the language of attribute value are different. Not be penalized.
123	0	Warning if the specified lang attribute and the language of the text are different. Not be penalized.
124	0	Warning if the link for navigation like <LINK REL="NEXT" HREF="～"> is not existing in <HEAD>. Not be penalized.(*)
125	0	Warning if <LINK REV="MADE" HREF="mailto:～"> is not existing in <HEAD>. Not be penalized.(@)
126	1	Warning if <LINK REL="CONTENTS"> is written as CONTENT .
127	0	Warning if the CONTENT attribute value of <META NAME="ROBOTS"> is not correct. Not be penalized.(*)
128	4	Warning if <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="～"> is not existing in <HEAD>.
129	1	Warning if CHARSET, which is specified in <META> , is different from registered.
130	3	Warning if CHARSET is specified at <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="～">.
131	9	Warning if non-ASCII character appear before CHARSET is specified by <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="～">
132	1	Warning if non-ASCII character appear in spite of that CHARSET can not use non-ASCII character. When specifying DATA area is not checked.
133	1	Warning if carriage return or control character exept tab contains. When specifying DATA area, is not checked.
134	1	Warning if one-byte katakana is including when CHARSET is JIS or Shift JIS. When specifying DATA area, is not checked.
135	1	Warning if the machine-dependent double-byte characters are including.
136	0	Warning if it contains a BOM at the beginning of the document.
137	5	Warning if encoding is not specified in the XML declaration In XHTML.
138	9	Warning if is inconsistent with the actual code/specifying CHARSET. When specifying DATA area, is not checked.
139	9	HTTPレスポンスヘッダでの CHARSET の指定と <META> の指定が矛盾していたら警告する。DATA領域指定のときはチェックされません。
140	5	Warning if without the CHARSET specify at HTTP response headers.
141	7	Warning if CONTENT-TYPE, which is specified in <META>, is not text / html.
142	8	Warning if conflict for the media and the <meta> type in the HTTP response header. When specifying DATA area, is not checked.
143	5	WARNING If the media type, which are unable to specify by HTML, is specified.
144	5	WARNING If <meta http-equiv> is written in the media type application/xhtml+xml.
145	4	WARNING If <META HTTP-EQUIV="CONTENT-TYPE"> is written multiple times.
146	1	Prompting to write <META HTTP-EQUIV="CONTENT-XXXX-TYPE"> by using <SCRIPT> or <STYLE>.
147	3	WARNING If <META HTTP-EQUIV="CONTENT-XXXX-TYPE"> is not specified in spite of using ONXXXX attribute or STYLE attribute.
148	5	WARNING If both the NAME and HTTP-EQUIV are specified at <META>.
149	5	WARNING If both HTTP-EQUIV and NAME are not specified at <META CONTENT>.
150	1	WARNING the event which should be used by a pair(@).
151	2	Prompting not to use <META HTTP-EQUIV="REFRESH">.
152	3	WARNING If there is no the link, corresponding <META HTTP-EQUIV="REFRESH">.
153	3	Prompting to enclose all elements inside <SCRIPT> <STYLE> by comments.
154	7	WARNING If </ is written directly into <SCRIPT> <STYLE>.
155	2	WARNING If a letter of undesirable is written in <SCRIPT> <STYLE>. Not be penalized.
156	1	WARNING If there is a comment inside <SCRIPT> <STYLE> in XHTML.
157	0	WARNING If there is no <NOSCRIPT> tag in spite of being <SCRIPT> tag. Not be penalized.(@).
158	1	Warning if more than 64 characters in length TITLE.
159	1	Warning if color specification is incomplete <BODY>
160	1	WARNING If the background color is not specified in spite of specifying the background image data.
161	3	Warning if the text color is specified as the same color as the background.
162	3	WARNING If text color is specified as the similar of background color.
163	3	Warning if not enough intensity ratio of the background and text color.
164	7	Warning if a duplicate value for attribute ID.
165	7	WARNING If the value of the ID attribute,which is undefined, is refered.
166	2	Warning if a duplicate element names <FORM>
167	3	WARNING if the text except blank is written just behind <FIELDSET>.
168	4	Warning if multiple CHECKED are specified by one radio button.
169	1	Warning if no CHECKED are specified by one radio button.
170	1	Warning if no SELECTED are specified in <OPTION>.
171	4	Warning if multiple SELECTEDs are specified at No multiple selection check boxes.
172	4	Warning if too many <OPTION>.
173	1	The edit boxes and text areas are urged to put the text as initial value.(@).
174	2	Prompting to specify the TYPE attribute at <BUTTON> tag In ISO / IEC 15445.
175	6	WARNING If an image map is put in <BUTTON>.
176	5	Warning if multiple form-controls are written in the <LABEL>.
177	5	Warning if No form-control is existing in the <LABEL> without for attribute.
178	1	Warning if FOR attribute value and ID attribute value of the form controls are different each other in <LABEL>.
179	0	Prompting to specify TABINDEX attribute in <INPUT> tag. Not be penalized.. (@).
180	0	Prompting to specify ACCESSKEY attribute in <INPUT> tag. Not be penalized.(@).
181	0	Prompting to specify TITLE attribute in <ABBR> tag. Not be penalized..(@).
182	3	Prompting to specify the nature of equality in the <OBJECT>.
183	1	Prompting to specify ALT attribute and the nature of equality in the <APPLET>.
184	2	Warning only when the attribute value is empty ALT.(@)
185	7	Prompting to specify ALT attribute in the <IMG> tag..
186	0	Prompting to specify WIDTH and HEIGHT attribute in the <IMG> tag.Not be penalized.(*) .
187	5	Warning if both ISMAP and USEMAP attributes are specified in <IMG>.
188	5	Warning if the server side image-map is used.
189	1	Prompting to specify SUMMARY attribute in the <TABLE> tag. (@)
190	0	Prompting to specify ABBR attribute in the <TH> tag. Not be penalized.(@)
191	3	Warning the SPAN attribute of <COLGROUP> with <COL>.
192	8	Warning if a table cell overlap.
193	6	Warning if <NOFRAMES> tag is not existing in spite of existing <FRAMESET>.
194	8	WARNING if itself is specified in URI of <FRAME>.
195	6	WARNING if direct image is specified by <FRAME>.
196	4	Prompting to specify TITLE attribute in the <FRAME> tag.
197	5	WARNING if multiple names of <FRAME> are specified.
198	5	WARNING if the names of <FRAME> are reserved.
199	1	Warning if the names of <FRAME> are reserved and designated by capital letters.
200	5	WARNING if the names of <FRAME> are not correct.
201	0	Prompting not to write a physical font tag (<B>、<I>、<TT>. Not be penalized.(@).
202	4	Warning if <P> tag is used like <BR> tag.
203	1	Warning if a large number of consecutive <BR> tag.
204	3	WARNING if a tab character is written inside <PRE>.
205	4	WARNING if the level of heading (<H1>～<H6>) is not continuous.
206	1	Urge to write a description equivalent to the image headings@
207	0	Prompting to specify ACCESSKEY attribute in the <A>. Not be penalized.@
208	1	Prompting to put something letters between link and link.@
209	2	Prompting to write the equivalent description at the link-image. @
210	1	WARNING D-link @
211	1	Warning if different links pointing to the same anchor. @
212	1	Warning if "here" or "ここ" is written as the anchor@
213	1	Warning if "here" or "ここ" is written as the anchor@
214	1	Warning if the space caracter is including in the anchor name.
215	1	Warning if the unsafe caracter is including in the anchor name.
216	5	Warning if the anchor name is empty.
217	5	Warning if the same anchor name is specified.
218	2	Warning if the same anchor name is specified without Case sensitive.
219	5	Warning if it is specified in the same anchor name and ID attributes.
220	0	Warning against an anchor name that is defined as an attribute ID. Not be penalized.*
221	4	Warning if a different value of the ID attribute value of the NAME attribute of the same tag.
222	1	Prompting to specify both the ID attribute and NAME attribute.
223	2	WARNING If small letters are used to the attribute value ID.
224	6	Warning against the anchor name is undefined.
225	0	Warning against the anchor name is not referenced. Not be penalized.*
226	5	Warning if URI is empty.
227	3	Warning if the space caracter is including at URI.
228	3	Warning if "\" is including at URI.
229	0	Warning if "~" is including at URI. Not be penalized. *
230	1	Warning if unavailable ASCII letter is including at URI.
231	1	Warning if unavailable letter is including at URI of entity reference.
232	7	Warning if the letter except ASCII is including at URI.
233	7	Warning if an incorrect scheme name is specified in the URI.
234	1	Warning if an capitalized scheme name is specified in the URI.
235	1	Warning if anunknown scheme name is specified in the URI.
236	5	Warning if URI referes such as local files: When specifying DATA area, is not checked.
237	5	Warning if unavailable scheme is specified in the URI.
238	0	Warning if URI is javascript: scheme.@
239	4	Warning if URI is incorrect format.
240	2	Warning if URI, which shoud end with "/", does not end with "/" .
241	3	Warning if URI starts with "//" .
242	0	Warning if URI, that ends in "/", and URI, that does not, are mixed . Not be penalized.
243	1	Warning if "～/index.html" and "～/" are not unified . *
244	5	Warning if appears before the URI specified by <BASE>
245	6	Warning if the URI, specified by <BASE> , is not specified absolutely.
246	9	Warning if the text still continues after </HTML>.
247	9	Warning if the file size exceeds the limit.
248	5	Warning if over-limited entity is specified in the image-file.
249	8	Warning if nested <UL> or <OL> is too deep in J-SkyWeb, .
250	8	Warning if the number of <LI> in'-SkyWeb andthe number of <PARAM> in iモードare over-limited.
251	9	Warning if the HTML for the patent application does not begin from <HTML>.
252	9	Warning if the HTML for the patent application or for iMode is not Shift JIS.
253	1	Warning if the HTML for the patent application uses the Not enable letters.
		HTML5 Tag Checks
254	9	Non-conforming descendants : Elements not allowed as child elements
255	9	Non-conforming attribute value check
256	9	MIME Type Syntax Error Check
257	9	Language-Code Check
258	9	Non-conforming Access Key check
259	9	Elements not allowed in the specific contexts
260	9	Progress Tag : Attribute value Conformance check
261	9	Elements not allowed in the specific contexts
262	9	IMG Tag : Conformance when using ISMAP attribute
263	9	Hash Name Reference Conformance Check
264	9	SCRIPT Tag : Conformance when using SRC attribute
265	9	TRACK Tag : Conformance check
266	9	Attributes not allowed in specific contexts.
267	9	METER Tag : Attribute Conformance Check
268	9	LIST/CONTEXTMENU ATTRIBUTE REFERENCE CHECK
		OBSOLETE TAGS IN HTML5
269	9	Obsolete Tags with no suggestions
270	9	Obsolete : FRAME, FRAMESET & NOFRAMES Tags
271	9	Obsolete : ACRONYM Tag
272	9	Obsolete : BGSOUND Tag
273	9	Obsolete : APPLET Tag
274	9	Osolete : LISTING Tag
275	9	Obsolete : NEXTID Tag
276	9	Obsolete : NOEMBED Tag
277	9	Obsolete : PLAINTEXT Tag
278	9	Obsolete : RB Tag
279	9	Obsolete : STRIKE Tag
280	9	Obsolete : XMP Tag
281	9	Obsolete : ISINDEX Tag
282	9	Obsolete : DIR Tag
		OBSOLETE ATTRIBUTES IN HTML5
283	9	CHARSET within A/LINK Tags
284	9	COORDS/SHAPE within A Tag
285	9	METHODS within A/LINK Tag
286	9	NAME within A/EMBED/IMG/OPTION Tags
287	9	REV within A/LINK Tag
288	9	URN wihtin A/LINK Tag
289	9	ACCEPT within FORM Tag
290	9	NOHREF within AREA Tag
291	9	PROFILE within HEAD Tag
292	9	VERSION within HTML Tag
293	9	USEMAP within INPUT Tag
294	9	LONGDESC within IFRAME/IMG Tag
295	9	LOWSRC within IMG Tag
296	9	TARGET within LINK Tag
297	9	SCHEME within META Tag
298	9	ARCHIVE/CLASSID/CODE/CODEBASE/CODETYPE within OBJECT Tag
299	9	DECLARE within OBJECT Tag
300	9	STANDBY within OBJECT Tag
301	9	TYPE/VALUETYPE within PARAM Tag
302	9	LANGUAGE within SCRIPT Tag
303	9	EVENT/FOR within SCRIPT Tag
304	9	DATAPAGESIZE within TABLE Tag
305	9	SUMMARY within TABLE Tag
306	9	ABBR within TD/TH Tag
307	9	AXIS within TD/TH
308	9	DATASRC/DATAFLD/DATAFORMATAS
309	9	Tags better handled by CSS

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